Energy self-sufficient radiofrequency transmitter

Information

  • Patent Grant
  • 9887711
  • Patent Number
    9,887,711
  • Date Filed
    Monday, March 10, 2014
    10 years ago
  • Date Issued
    Tuesday, February 6, 2018
    6 years ago
Abstract
The energy self-sufficient radiofrequency transmitter has at least one electromechanical transducer with a rectifier circuit connected downstream and with a voltage converter circuit. A logic circuit configuration is connected to the voltage converter circuit. The logic circuit configuration has a sequence controller a memory in which an identification code is stored. The energy self-sufficient radiofrequency transmitter also has a radiofrequency transmission stage that is connected to the logic circuit configuration and a transmission antenna.
Description
BACKGROUND OF THE INVENTION
Field of the Invention

The invention relates to an energy self-sufficient radiofrequency transmitter, the use thereof, and also to a method for the energy self-sufficient transmission of a radiofrequency signal.


Energy self-sufficient systems in which mechanical energy is converted into electrical energy using a piezoelectric transducer and then rectified are known in the prior art. The electrical energy is used to drive simple resonant circuits.


SUMMARY OF THE INVENTION

It is accordingly an object of the invention to provide an energy self-sufficient radiofrequency transmitter and a method for the energy self-sufficient transmission of a radiofrequency signal that enable the communication of information to be improved.


With the foregoing and other objects in view there is provided, in accordance with the invention, an energy self-sufficient radiofrequency transmitter, including: at least one electromechanical transducer; a rectifier circuit connected downstream from the transducer; a voltage converter circuit; a logic circuit configuration connected to the voltage converter circuit; a radiofrequency transmission stage connected to the logic circuit configuration; and at least one transmission antenna. The logic circuit configuration includes a sequence controller and a memory for storing an identification code.


In accordance with an added feature of the invention, the electromechanical transducer includes at least one piezoelectric element.


In accordance with an additional feature of the invention, the piezoelectric element is a bending transducer.


In accordance with another feature of the invention, the electromechanical transducer includes at least one induction coil.


In accordance with a further feature of the invention, the voltage converter circuit includes an energy storage element.


In accordance with another added feature of the invention, the voltage converter circuit can be operated in a clocked manner.


In accordance with another additional feature of the invention, there is provided, at least one capacitor for storing energy. The capacitor is connected between the rectifier circuit and the voltage regulating circuit.


In accordance with a further added feature of the invention, the logic circuit configuration includes at least one component selected from a group consisting of at least one microprocessor and an ASIC.


In accordance with a further additional feature of the invention, there is provided, at least one sensor connected to the logic circuit configuration.


In accordance with yet an added feature of the invention, the logic circuit configuration is embodied using ULP technology.


In accordance with yet an additional feature of the invention, the logic circuit configuration has clock generator including an LC resonant circuit or an RC resonant circuit.


In accordance with yet another feature of the invention, the radiofrequency transmission stage is constructed for transmitting a radiofrequency signal having a frequency of greater than 1 MHz.


In accordance with yet a further feature of the invention, the radiofrequency transmission stage is constructed for transmitting a radiofrequency signal having a frequency between 100 MHz and 30 GHz.


In accordance with yet a further added feature of the invention, the radiofrequency signal can have a bandwidth of more than 100 kHz.


In accordance with yet another added feature of the invention, a delay device is connected between the logic circuit configuration and the transmission antenna.


With the foregoing and other objects in view there is provided, in accordance with the invention, a method for energy self-sufficiently transmitting a radiofrequency signal. The method includes: using an electromechanical transducer to convert a mechanical movement into a voltage signal; obtaining a rectified voltage signal by rectifying the voltage signal; converting the rectified voltage signal to produce a voltage level that is constant at least in sections; after converting the rectified signal, using the rectified voltage signal to supply energy to at least one logic circuit configuration; using the logic circuit configuration to communicate at least one identification code to a radiofrequency transmission stage; and using the radiofrequency transmission stage and a transmission antenna to radiate a radiofrequency signal containing the identification code.


In accordance with an added mode of the invention, the step of using the logic circuit configuration to communicate the identification code to the radiofrequency transmission stage includes: reading out the identification code from a memory of the logic circuit configuration; generating a transmission telegram including the identification code; activating the radiofrequency transmission stage; and modulating a radiofrequency oscillation with the transmission telegram.


In accordance with an additional mode of the invention, the method includes providing measurement data obtained from at least one sensor to the logic circuit configuration; and impressing the measurement data on the radiofrequency signal.


In accordance with another mode of the invention, the method includes radiating a plurality of radiofrequency signals one after another; each one of the plurality of the radiofrequency signals having a complete information content.


In accordance with a further mode of the invention, the method includes variably setting a time interval of individual ones of the plurality of the radiofrequency signals with respect to one another.


In accordance with a further added mode of the invention, the method includes variably setting a frequency of individual ones of the plurality of the radiofrequency signals with respect to one another.


In accordance with a further additional mode of the invention, the method includes encrypting information of the radiofrequency signal.


In accordance with yet an added mode of the invention, the method includes differently encrypting a plurality of radiofrequency signals.


In accordance with yet an additional mode of the invention, the method includes radiating the radiofrequency signal in a time-delayed manner.


In accordance with another added mode of the invention, the method includes transmitting the radiofrequency signal with a bandwidth greater than 100 kHz.


In accordance with another additional mode of the invention, the method includes transmitting the radiofrequency signal with a frequency of greater than 1 MHz.


In accordance with a further mode of the invention, the method includes transmitting the radiofrequency signal with a frequency of between 100 MHz and 30 GHz.


To that end the radiofrequency transmitter has at least one electromechanical transducer with a rectifier circuit connected downstream and at least one voltage converter circuit. A logic circuit configuration is connected to the voltage converter circuit. The logic circuit configuration includes at least one sequence controller and a memory in which an identification code is stored. A radiofrequency transmission stage is connected to the logic circuit configuration and is controlled by the logic circuit configuration. The radiofrequency signals generated by the radiofrequency transmission stage are radiated by at least one transmission antenna.


An electromechanical transducer is understood to be a general component in which mechanical energy can be converted into electrical energy, for example, a piezo-electric, electrostrictive or magnetostrictive element or an electromagnetic induction coil.


The mechanical energy can be generated, for example, from:

    • a manual actuation of a switch, pushbutton or another operating element;
    • a directed mechanical force action, for example the opening or closing of windows or doors or stop switches in industrial installations;
    • a pressure change, for example in liquids or gases; or
    • a vibration, for example, on machines, wheels, vehicles.


The voltage generated by the transducer is rectified by the rectifier circuit and is then forwarded to a voltage converter. The voltage converter ensures that a constant voltage can be tapped off at least over a short period of time. As a result, voltage spikes are avoided, and moreover, the operating reliability is increased.


The connection between the rectifier and the voltage converter can be effected directly or via a current storage element that is additionally present, e.g. a capacitor. When a capacitor is present, by way of example, the downstream voltage converter can convert a typically exponentially falling charging voltage of the capacitor into a constant voltage at least for a short time. However, the converter can also store the electrical voltages itself.


Given the presence of a sufficient voltage signal for supplying energy to the logic circuit configuration, the logic circuit configuration communicates at least one identification code, and if appropriate, other information as well, for example sensor measurement signals, to the radio-frequency transmission stage. In the radiofrequency transmission stage, the voltage signal is used to generate a radiofrequency signal containing the identification code and to radiate it via the transmission antenna.


This method for the energy self-sufficient communication of signals has the advantage that the degree of utilization of the energy supplied by the transducer, with respect to the information density that can be emitted, is very high. Although such a system consumes a higher electrical energy per unit time compared with simple resonant circuits it is nonetheless possible to transmit a more than proportionally high information density per unit time relative thereto. Altogether, this results in a better utilization of the electrical energy made available by the transducer.


In order to achieve a high efficiency and a compact design, it is advantageous if the electromechanical transducer contains at least one piezoelement, in particular a piezoelectric bending transducer.


It is also preferred, e.g. in order to achieve an inexpensive construction, if the electromechanical transducer contains at least one induction coil.


In order to ensure a sufficiently long energy supply, it is advantageous if at least one energy storage element, e.g. in the form of a capacitor, for storing current is present between the rectifier circuit and the voltage converter circuit.


In order to increase the efficiency, it is favorable, moreover, if the voltage converter circuit is equipped with a further energy storage element. In particular, this is favorable if the voltage converter circuit is operated in a clocked manner.


It is additionally favorable if the logic circuit configuration is connected to at least one sensor. As a result, in addition to the identification code, measurement data from the at least one sensor can also be acquired or read out by the logic circuit configuration and the measurement data can be impressed on the radiofrequency signal.


It is also advantageous if, given a voltage supply over a sufficiently long time, a plurality of radiofrequency signals with complete information content are radiated one after the other, because this redundancy creates an increased communication reliability.


For increased security against interception, it is advantageous if the information of the radiofrequency signal is encrypted, typically by an encryption logic integrated into the logic circuit configuration. As a result, it is also possible to increase the transmission reliability by inputting individual keys, for example for access control purposes. In particular, when transmitting a plurality of radiofrequency signals, it is favorable if each of the radiofrequency signals is encrypted differently, e.g. with a different key.


Moreover, in order to suppress a transmission disturbance, it is favorable if, when transmitting a plurality of radiofrequency signals, their time interval with respect to one another is variable and/or the frequency of the individual radiofrequency signals differs.


Likewise for the purpose of increased transmission reliability, in particular in environments with a plurality of radiofrequency transmitters, it is advantageous if the radiation of the radiofrequency signal is time-delayed, for example by the variable, e.g. statistical, setting of a delay. The delay can be realized, for example, in the software of the logic circuit configuration. Using radiofrequency transmitters with in each case a statistically distributed delay time of their delay devices makes it possible to increase the transmission probability.


In order to reduce the energy consumption of the radiofrequency transmitter, it is advantageous if the logic circuit configuration is embodied using ultra low power technology (ULP technology).


It is advantageous if the logic circuit configuration contains a microprocessor or an ASIC (Application-Specific Integrated Circuit) module.


Typically, part of the electrical energy provided by the transducer is used to run up the logic circuit configuration into an operating state. To that end, an oscillating crystal is normally provided as a clock generator. For shortening the time for running up the logic circuit configuration, it is favorable if, instead of an oscillating crystal, an LC resonant circuit or an RC resonant circuit is present as the clock generator.


In order to achieve a high data transmission rate, it is advantageous if a signal with a frequency of >1 MHz is transmitted using the radiofrequency transmission stage. By way of example, frequencies F of between 100 MHz and 30 GHz are realized in technology nowadays. However, there is no fundamental upper limit for the frequency.


In order to achieve a high data throughput within a short time, it is advantageous if the bandwidth of the radiofrequency signal is at least 100 KHz.


It is preferred if, during a transmission cycle, the logic circuit configuration:

    • reads out the identification code, for example, from a memory of the logic circuit configuration;
    • generates a transmission telegram containing at least the identification code, and if appropriate, other information, for example, measurement data from sensors;
    • activates the radiofrequency transmission stage; and
    • modulates the transmission telegram onto the radiofrequency oscillation, and if appropriate, encrypts it and/or subjects it to a time delay.


The use of the radiofrequency transmitter is particularly advantageous in traffic technology, in particular automotive technology and rail technology, and/or in building technology, in particular installation technology, for example for controlling domestic appliances, electrical installations or for access control purposes.


Individual aspects of using the radiofrequency transmitter will now be described in more detail schematically using a mechanically fed light switch as an application. It goes without saying, however, that the invention is not restricted to this specific application.


a) Voltage Generation:


To generate voltage, i.e. to convert mechanical energy into electrical energy, a piezoelectric bending transducer is used which, e.g. in the case of a force action of 5 N, experiences a flexure of 5 mm and builds up a resulting electrical voltage of 50 V across its inherent capacitor of 50 nF. Transducers with these parameters are known in the prior art and match a commercially available light switch well in terms of the dimensions and mechanical requirements.


b) Voltage Conditioning:


Voltage stabilization is obtained by using a prior art voltage converter with a high efficiency and a high input voltage dynamic range. If the charging voltage across the capacitor then falls during operation e.g. from 20 V to 5 V, the stabilization circuit provides a constant 3 V at the output.


c) Energy Consideration:


The following energy consideration is intended to show that it is possible to operate a processor circuit and a radiofrequency transmitter for a short time with the energy generated in our exemplary embodiment:


Let the electrical energy in the bending transducer be E=½ C·U2=½ 50·10−9·502 [V2 As/V]=62.5 2 μWs, and approximately 50 μWs thereof remain given 80% efficiency of the transducer. An electronic circuit requiring e.g. approximately 20 mW (3 V and 6.6 mA) can thus be operated for a time duration of t=50 μWs/20 mW=2.5 ms.


d) Transmission Rate and Volume of Data:


If a modulation rate of the radiofrequency transmitter of 100 Kbits/s is assumed, then data with a scope of approximately 250 bits can be emitted in this time. This volume of data suffices for encrypting the identity of the switch and also affords the possibility of increasing the transmission reliability by repeated emission or the application of correlation methods. Moreover, the use of the logic circuit configuration, typically a microprocessor or an ASIC, allows encryption of the data to be transmitted.


e) Radiofrequency Transmitter:


The radiofrequency transmitter is based on a power of 1 mW, which suffices to reliably transmit data to every point within a private residence. In this case, a typical scenario is that all the switches, for example light switches, upon actuation, emit one or a plurality of radiofrequency telegrams which are received by a single receiver and the latter initiates the corresponding actions (lamp on/off, dimming of lamp, etc.).


It goes without saying that the energy self-sufficient radiofrequency transmitter is not restricted to an application in building technology, but rather can be used universally. Examples of possible fields of application are switch applications such as manually actuated emergency transmitters, access authorization interrogations, remote controls, other switches, limit switches in industry, traffic, in private households, in meters for water, gas and electricity, as motion detectors, animal monitoring, break-in/theft protection, and generally in automotive technology for reducing the wiring harness in motor vehicles, or in railroad systems.


An example of an appropriate sensor system application is a sensor for temperature, pressure, force and other measurement quantities, in particular for measuring automobile tire pressure and temperature, axle temperature and accelerations on trains, and the temperature or pressure force of motors and installations in industry.


Other features which are considered as characteristic for the invention are set forth in the appended claims.


Although the invention is illustrated and described herein as embodied in an energy self-sufficient radiofrequency transmitter, it is nevertheless not intended to be limited to the details shown, since various modifications and structural changes may be made therein without departing from the spirit of the invention and within the scope and range of equivalents of the claims.


The construction and method of operation of the invention, however, together with additional objects and advantages thereof will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.





BRIEF DESCRIPTION OF THE DRAWING

The sole drawing FIGURE schematically shows the different functional units of the radiofrequency transmitter.





DESCRIPTION OF THE PREFERRED EMBODIMENTS

Referring now to the sole drawing FIGURE in detail, there is shown an electromechanical transducer 1, preferably a piezoelectric bending transducer or an induction coil that enables mechanical energy to be utilized for charge separation and thus for voltage generation. The mechanical energy originates for example from a mechanical force action, (e.g. button pressing) from a pressure change or a vibration. The voltage generated is used to charge a capacitor 7 via a rectifier circuit 2. Alternatively, direct feeding of the voltage regulating circuit 3 is also possible, and by way of example, the transducer 1 can store the charges itself. The downstream voltage conversion is advantageous in order to generate, from the exponentially falling charging voltage of the capacitor 7, a voltage that is constant over a short period of time for operating the downstream electronics.


The constant voltage is used to activate and supply the downstream logic circuit configuration 4 and radiofrequency transmission stage 5 as long as the stored energy permits this. The logic circuit configuration 4 contains a microprocessor sequence controller, a memory in which the identity of the measurement location or of the switch is stored, and (optionally) sensor inputs via which one or a plurality of sensors 8 can be connected.


If a supply voltage is available due to a mechanical energy feed, then the following processor-controlled sequence is initiated:


a) reading-out the identification code;


b) reading-out the connected sensors 8 (optional);


c) encrypting the data (optional);


d) generating a transmission telegram containing the identification code;


e) activating the radiofrequency transmission stage 5; and


f) modulating the radiofrequency oscillation with the transmission telegram (optionally a number of times as long as sufficient energy is available or until a different termination criterion is reached).


The radiofrequency transmission stage 5 generates a radiofrequency oscillation that is radiated via the transmission antenna 6. The transmission telegram generated by the logic circuit configuration 4 is modulated onto the oscillation.

Claims
  • 1. A switching system, comprising: an electromechanical generator to generate electrical energy;a rectifier electrically connected to said electromechanical generator;an electrical energy store electrically connected to said rectifier and configured to receive said electrical energy from said electromechanical generator;a voltage regulator having an input side and an output side;said input side of said voltage regulator electrically connected to an output side of said rectifier;a first signal transmitter electrically connected to said output side of said voltage regulator and configured to repeatedly transmit a first electromagnetic signal responsive to sufficient electrical energy being in the electrical energy store and until there is insufficient electrical energy in the electrical energy store;said first signal transmitter comprising a first electromagnetic signal generator subcircuit connected to a transmission antenna configured to transmit said first electromagnetic signal;a signal receiver to receive the first electromagnetic signal transmitted by said first signal transmitter;said signal receiver adapted to generate a second signal in response to said first electromagnetic signal transmitted by said first signal transmitter; anda switch having a first position and a second position;said switch in communication with said signal receiver;said switch adapted to change between said first position and said second position in response to said second signal.
  • 2. The switching system according to claim 1, wherein said electromechanical generator is selected from a group consisting of a piezoelectric transducer, an electrostrictive element, a magnetostrictive element, and an electromagnetic induction coil.
  • 3. The switching system according to claim 1, further comprising: said electrical energy store having an input side and an output side;said input side of said electrical store being electrically connected to the output side of said voltage regulator;whereby said electrical energy store is adapted to store an electrical output of said voltage regulator,and wherein said electrical energy store is adapted to supplement said electrical output of said voltage regulator to said first signal transmitter with said stored electrical output of said voltage regulator.
  • 4. The switching system according to claim 1, further comprising: said electrical energy store having an input side and an output side;said input side of said electrical energy store being electrically connected to the output side of said rectifier;whereby said electrical energy store is adapted to store an electrical output of said rectifier;and wherein said electrical energy store is adapted to supplement electrical output of said voltage regulator to said first signal transmitter with said stored electrical output of said rectifier.
  • 5. The switching system according to claim 1, wherein the transmission antenna is configured to transmit the first electromagnetic signal at a frequency of between about 100 MHz and about 30 GHz.
  • 6. The switching system according to claim 1, wherein a voltage is an oscillating voltage.
  • 7. A switching system comprising: an electromechanical generator to generate electrical energy;a rectifier electrically connected to said generator;an electrical energy store electrically configured to receive said electrical energy from said electromechanical generator;a voltage regulator having an input side and an output side;said input side of said voltage regulator electrically connected to an output side of said rectifier;a first signal transmitter electrically connected to said output side of said voltage regulator;said first signal transmitter comprising a first electromagnetic signal generator subcircuit connected to a transmission antenna, said first signal transmitter configured to repeatedly transmit a first electromagnetic signal responsive to sufficient electrical energy being in the electrical energy store and until there is insufficient electrical energy in the electrical energy store;a signal receiver to receive the first electromagnetic signal transmitted by said first signal transmitter;said signal receiver being adapted to initiate an action in response to said first electromagnetic signal transmitted by said first signal transmitter; anda switch having a first condition and a second condition;said switch being in communication with said signal receiver;said switch being adapted to change between said first condition and said second condition in response to said initiated action.
  • 8. The switching system according to claim 7, wherein said electrical energy store stores electrical energy generated by the electromechanical generator.
  • 9. The switching system according to claim 7, wherein the first signal transmitter is configured to transmit the first electromagnetic signal at a frequency between about 100 MHz and about 30 GHz.
  • 10. A switching system comprising: an electromechanical generator to generate electrical energy;a voltage regulator having an input side and an output side;an electrical energy store electrically configured to receive the electrical energy from said electromechanical generator;a first signal transmitter electrically connected to said output side of said voltage regulator;said first signal transmitter comprising a first electromagnetic signal generator subcircuit connected to a transmission antenna, said first signal transmitter configured to repeatedly transmit a first electromagnetic signal responsive to sufficient electrical energy being in the electrical energy store and until there is insufficient electrical energy in the electrical energy store;a signal receiver to receive the first electromagnetic signal transmitted by said first signal transmitter;said signal receiver adapted to initiate an action in response to said first electromagnetic signal transmitted by said first signal transmitter; anda switch having a first condition and a second condition;said switch being in communication with said signal receiver;said switch being adapted to change between said first condition and said second condition in response to said initiated action.
  • 11. The switching system of claim 10, wherein a voltage generated by the electromechanical generator comprises an oscillating voltage, the switching system further comprises a rectifier coupled to an output of the electromechanical generator, and the input side of the voltage regulator is connected to the rectifier.
  • 12. The switching system according to claim 10, wherein said electrical energy store stores electrical energy generated by an electromechanical transducer.
  • 13. The switching system of claim 10, wherein the first signal transmitter is configured to transmit the first electromagnetic signal at a frequency between about 100 MHz and about 30 GHz.
  • 14. A self-powered switching system, comprising: an electromechanical generator to generate a voltage across first and second electrical terminals;a voltage regulator having an input side and an output side;said input side of said voltage regulator being electrically connected to said first and second electrical terminals;a first signal transmitter electrically connected to said output side of said voltage regulator;said first signal transmitter comprising a first electromagnetic signal generator subcircuit connected to a transmitter configured to repeatedly transmit a first electromagnetic signal responsive to sufficient electrical energy being in an electrical energy store and until there is insufficient electrical energy in the electrical energy store; anda first tone generator subcircuit having an input side and an output side;said input side of said first tone generator subcircuit connected to said output side of said voltage regulator;said output side of said tone generator subcircuit connected to said first electromagnetic signal generator subcircuit;wherein said first tone generator subcircuit and said first electromagnetic signal generator subcircuit comprise a first at least one programmable encoder circuit;and wherein each of said first at least one programmable encoder circuit is adapted to be programmed to generate one or more unique codes;and wherein each of said one or more unique codes generated by each of said first programmable encoder circuits is different from each of said unique codes generated by the others of said first programmable encoder circuits;a signal receiver for receiving the first electromagnetic signal transmitted by said first signal transmitter;said signal receiver adapted to generate a second signal in response to said first electromagnetic signal transmitted by said first signal transmitter; anda switch having a first position and a second position;said switch being in communication with said signal receiver;said switch being adapted to change between said first position and said second position in response to said second signal.
  • 15. The switching system according to claim 14, further comprising: a second signal transmitter comprising a second at least one programmable encoder circuit connected to an antenna;each of said second programmable encoder circuits comprising a second radio frequency generator subcircuit and a second tone generator subcircuit;wherein each of said second programmable encoder circuits is adapted to be programmed to generate one or more unique codes;and wherein each of said unique codes generated by each of said second programmable encoder circuits is different from each of said unique codes generated by each of said first programmable encoder circuits, and different from each of said unique codes generated by the others of said second programmable encoder circuits.
  • 16. The switching system according to claim 14, further comprising encryption logic for encrypting data to be output as said first electromagnetic signal via the first signal transmitter.
  • 17. The switching system according to claim 16, wherein the data encrypted by the encryption logic includes the one or more unique codes.
  • 18. A self-powered switching system, comprising: an electromechanical transducer for electrical energy generation;a voltage regulator having an input side and an output side;an electrical energy store electrically configured to receive said electrical energy from said electromechanical transducer;said input side of said voltage regulator being electrically connected to said electromechanical transducer;a first signal transmitter electrically connected to said output side of said voltage regulator;said first signal transmitter comprising a first logic circuit connected to a transmitter configured to repeatedly transmit a first electromagnetic signal responsive to sufficient electrical energy being in the electrical energy store and until there is insufficient electrical energy in the electrical energy store; anda first clock generator subcircuit having an input side and an output side;said input side of said first clock generator subcircuit being connected to said output side of said voltage regulator;said output side of said first clock generator subcircuit connected to said first logic circuit;wherein said first clock generator subcircuit and said first logic circuit comprise a first at least one programmable encoder circuit;and wherein each of said first programmable encoder circuits is adapted to be programmed to generate one or more codes;and wherein each of said one or more codes generated by each of said first programmable encoder circuits identifies said first programmable encoder circuits;a signal receiver for receiving the first electromagnetic signal transmitted by said first signal transmitter;said signal receiver adapted to initiate an action in response to said first electromagnetic signal transmitted by said first signal transmitter; anda switch having a first position and a second position;said switch being in communication with said signal receiver;said switch being adapted to change between said first position and said second position in response to said signal receiver.
  • 19. The self-powered switching system according to claim 18, further comprising encryption logic for encrypting data to be output as said first electromagnetic signal via the first signal transmitter.
  • 20. The self-powered switching system according to claim 19, wherein the data encrypted by the encryption logic includes the one or more codes.
  • 21. An energy self-sufficient apparatus, comprising: an electromechanical transducer;a voltage regulating circuit;an input of said voltage regulating circuit being electrically connected to said electromechanical transducer;a radio frequency transmission stage electrically connected to said voltage regulating circuit;a radio frequency transmitter comprising a first logic circuit configuration connected to said radio frequency transmission stage, wherein said radio frequency transmitter is configured to repeatedly transmit a radiofrequency telegram responsive to sufficient electrical energy being in an electrical energy store and until there is insufficient electrical energy in the electrical energy store; anda first clock generator;an input side of said first clock generator being connected to an output side of said voltage regulating circuit;an output side of said first clock generator being connected to said first logic circuit configuration;wherein said first clock generator and said first logic circuit configuration comprise at least one microprocessor;and wherein each of said at least one microprocessor is adapted to read out at least one identification code to be output as said radiofrequency telegram via the radio frequency transmitter;a receiver adapted to receive the radiofrequency telegram transmitted by said radio frequency transmission stage;said receiver being adapted to initiate an action in response to said radio frequency telegram transmitted by said radio frequency transmission stage; anda switch having an on position and an off position;said switch being in communication with said receiver;said switch being adapted to change between said on position and said off position in response to said receiver.
  • 22. The apparatus according to claim 21, comprising: a second signal transmitter comprising a second at least one microprocessor connected to a transmission antenna;each of said second signal transmitter comprising a second radio frequency transmission stage and a second clock generator;and wherein each of said second at least one microprocessor is adapted to read out at least one identification code.
  • 23. The energy self-sufficient apparatus according to claim 21, wherein each of said at least one microprocessor is adapted to encrypt data to be output as the radiofrequency telegram.
  • 24. The energy self-sufficient apparatus according to claim 23, wherein the data encrypted by the microprocessor includes the at least identification code.
  • 25. An energy self-sufficient apparatus, comprising: an electromechanical transducer to generate electrical energy;a voltage regulating circuit;an electrical energy store configured to receive the electrical energy;an input of said voltage regulating circuit electrically connected to said electromechanical transducer;a first radio frequency transmission stage electrically connected to said voltage regulating circuit;a radiofrequency transmitter comprising a first logic circuit configuration connected to said first radio frequency transmission stage and configured to repeatedly transmit a radiofrequency telegram signal responsive to sufficient electrical energy being in the electrical energy store and until there is insufficient electrical energy in the electrical energy store; anda first clock generator;an input side of said first clock generator connected to an output side of said voltage regulating circuit;an output side of said first clock generator connected to said logic circuit configuration;wherein said first clock generator and said first logic circuit configuration comprise at least one microprocessor;a receiver adapted to receiving the radiofrequency telegram signal transmitted by said first radio frequency transmission stage;said receiver adapted to initiate an action in response to said radiofrequency telegram transmitted by said first radio frequency transmission stage; anda switch having an on position and an off position;said switch in communication with said receiver; andsaid switch adapted to change between said on position and said off position in response to said receiver.
  • 26. The energy self-sufficient apparatus according to claim 25, wherein each of said at least one microprocessor is adapted to use a key to encrypt data to be transmitted in said radiofrequency telegram by the radiofrequency transmitter, wherein each key is different.
  • 27. The energy self-sufficient apparatus according to claim 26, wherein the data encrypted by the at least one microprocessor includes an identification code least identification code associated with the switch.
Priority Claims (1)
Number Date Country Kind
100 25 561 May 2000 DE national
CROSS-REFERENCE TO RELATED APPLICATION

This application is a continuation of U.S. patent application Ser. No. 13/756,925, filed Feb. 1, 2013, which is a continuation of U.S. patent application Ser. No. 13/456,994, filed Apr. 26, 2012, which is a continuation of U.S. patent application Ser. No. 13/034,491, filed Feb. 24, 2011, which is a continuation of U.S. patent application Ser. No. 12/248,682, filed Oct. 9, 2008, which is a continuation of U.S. patent application Ser. No. 10/304,121, filed Nov. 25, 2002, which is a continuation of International Application No. PCT/DE01/01965, filed May 21, 2001, which designated the United States and was not published in English, and which claims priority to German Patent Application Number DE 100 25 561.2, filed May 24, 2000, each of which is incorporated herein by reference in their entireties.

US Referenced Citations (259)
Number Name Date Kind
1872257 Durkee Aug 1932 A
2565158 Williams Aug 1951 A
2813242 Crump Nov 1957 A
2874292 Varley Feb 1959 A
2995633 Puharich et al. Aug 1961 A
3077574 Marks Feb 1963 A
3093760 Tarasevich Jun 1963 A
3219850 Langevin Nov 1965 A
3230455 Kosta Jan 1966 A
3270283 Ikrath et al. Aug 1966 A
3315166 Crump Apr 1967 A
3370567 Reith Feb 1968 A
3456134 Ko Jul 1969 A
3553588 Honig Jan 1971 A
3596262 Rollwitz et al. Jul 1971 A
3614760 Zimmet et al. Oct 1971 A
3621398 Willis Nov 1971 A
3624451 Gauld Nov 1971 A
3633106 Willis Jan 1972 A
3683211 Perlman et al. Aug 1972 A
3697975 Bernstein et al. Oct 1972 A
3735412 Kampmeyer May 1973 A
3760422 Zimmer et al. Sep 1973 A
3781836 Kruper et al. Dec 1973 A
3781955 Lavrinenko et al. Jan 1974 A
3783211 Panettieri Jan 1974 A
3796958 Johnston et al. Mar 1974 A
3818467 Willis Jun 1974 A
3824857 Smith Jul 1974 A
3827038 Willis Jul 1974 A
3866206 DeGiorgio et al. Feb 1975 A
3928760 Isoda Dec 1975 A
3949247 Fenner et al. Apr 1976 A
3970939 Willis Jul 1976 A
3971028 Funk Jul 1976 A
3986119 Hemmer, Jr. et al. Oct 1976 A
3989963 Giaccardi Nov 1976 A
4001798 Robinson Jan 1977 A
4004458 Knothe et al. Jan 1977 A
4127800 Long et al. Nov 1978 A
4160234 Karbo et al. Jul 1979 A
4177438 Vittoria Dec 1979 A
4177800 Enger Dec 1979 A
4220907 Pappas et al. Sep 1980 A
4231260 Chamuel Nov 1980 A
4237728 Betts et al. Dec 1980 A
4257010 Bergman et al. Mar 1981 A
4259715 Morokawa Mar 1981 A
4300119 Wiernicki Nov 1981 A
4349762 Kitamura et al. Sep 1982 A
4355309 Hughey et al. Oct 1982 A
4371814 Hannas Feb 1983 A
4412355 Terbrack et al. Oct 1983 A
4433719 Cherry et al. Feb 1984 A
4471353 Cernik Sep 1984 A
4489269 Edling et al. Dec 1984 A
4504761 Triplett Mar 1985 A
4510484 Snyder Apr 1985 A
4521712 Braun et al. Jun 1985 A
4522099 Melsheimer Jun 1985 A
4524283 Latvus Jun 1985 A
4595864 Stiefelmeyer et al. Jun 1986 A
4612472 Kakizaki et al. Sep 1986 A
4626698 Harnden, Jr. et al. Dec 1986 A
4701681 Koike Oct 1987 A
4704543 Barker et al. Nov 1987 A
4739211 Strachan Apr 1988 A
4748366 Taylor May 1988 A
4786837 Kalnin et al. Nov 1988 A
4870700 Ormanns et al. Sep 1989 A
4878052 Schulze Oct 1989 A
5012223 Griebell et al. Apr 1991 A
5118982 Inoue et al. Jun 1992 A
5136202 Carenzo et al. Aug 1992 A
5146153 Luchaco et al. Sep 1992 A
5151695 Rollwitz et al. Sep 1992 A
5237264 Moseley et al. Aug 1993 A
5262696 Culp Nov 1993 A
5270704 Sosa Quintana et al. Dec 1993 A
5278471 Uehara et al. Jan 1994 A
5289160 Fiorletta Feb 1994 A
5301362 Ohkawa Apr 1994 A
5317303 Ross et al. May 1994 A
5327041 Culp Jul 1994 A
5339073 Dodd et al. Aug 1994 A
5339079 Ledzius et al. Aug 1994 A
5340954 Hoffman et al. Aug 1994 A
5431694 Snaper et al. Jul 1995 A
5471721 Haertling Dec 1995 A
5491486 Welles et al. Feb 1996 A
5499013 Konotchick Mar 1996 A
5535627 Swanson et al. Jul 1996 A
5546070 Ellmann et al. Aug 1996 A
5548189 Williams Aug 1996 A
5563600 Miyake Oct 1996 A
5569854 Ishida et al. Oct 1996 A
5572190 Ross et al. Nov 1996 A
5573611 Koch et al. Nov 1996 A
5578877 Tiemann Nov 1996 A
5581023 Handfield et al. Dec 1996 A
5581454 Collins Dec 1996 A
5589725 Haertling Dec 1996 A
5592169 Nakamura et al. Jan 1997 A
5605336 Gaoiran et al. Feb 1997 A
5631816 Brakus May 1997 A
5632841 Hellbaum et al. May 1997 A
5659549 Oh et al. Aug 1997 A
5664570 Bishop Sep 1997 A
5675296 Tomikawa Oct 1997 A
5717258 Park Feb 1998 A
5725482 Bishop Mar 1998 A
5731691 Noto Mar 1998 A
5734445 Neill Mar 1998 A
5736965 Mosebrook et al. Apr 1998 A
5741966 Handfield et al. Apr 1998 A
5749547 Young et al. May 1998 A
5751092 Abe May 1998 A
5781646 Face Jul 1998 A
5797201 Huang Aug 1998 A
5801475 Kimura Sep 1998 A
5814922 Uchino et al. Sep 1998 A
5816780 Bishop et al. Oct 1998 A
5831371 Bishop Nov 1998 A
5834882 Bishop Nov 1998 A
5835996 Hashimoto et al. Nov 1998 A
5839306 Nunuparov Nov 1998 A
5844516 Viljanen Dec 1998 A
5849125 Clark Dec 1998 A
5854994 Canada et al. Dec 1998 A
5861702 Bishop et al. Jan 1999 A
5861704 Kitami et al. Jan 1999 A
5872513 Fitzgibbon et al. Feb 1999 A
5886647 Badger et al. Mar 1999 A
5886723 Kubelik et al. Mar 1999 A
5886847 Lee et al. Mar 1999 A
5889464 Huang Mar 1999 A
5892318 Dai et al. Apr 1999 A
5905442 Mosebrook et al. May 1999 A
5911529 Crisan Jun 1999 A
5918502 Bishop Jul 1999 A
5918592 Kazubski et al. Jul 1999 A
5923542 Sasaki et al. Jul 1999 A
5933079 Frink Aug 1999 A
5939816 Culp Aug 1999 A
5939818 Hakamata Aug 1999 A
5949516 McCurdy Sep 1999 A
5962951 Bishop Oct 1999 A
5979199 Elpern et al. Nov 1999 A
5982355 Jaeger et al. Nov 1999 A
5995017 Marsh et al. Nov 1999 A
5998938 Comberg et al. Dec 1999 A
6014896 Schoess Jan 2000 A
6025783 Steffens, Jr. Feb 2000 A
6026165 Marino Feb 2000 A
6028506 Xiao Feb 2000 A
6030480 Face, Jr. et al. Feb 2000 A
6037706 Inoi et al. Mar 2000 A
6040654 Le Letty Mar 2000 A
6042345 Bishop et al. Mar 2000 A
6052300 Bishop et al. Apr 2000 A
6054796 Bishop Apr 2000 A
RE36703 Heitschel et al. May 2000 E
6071088 Bishop et al. Jun 2000 A
6074178 Bishop et al. Jun 2000 A
6075310 Bishop Jun 2000 A
6079214 Bishop Jun 2000 A
6084530 Pidwerbetsky et al. Jul 2000 A
6087757 Honbo et al. Jul 2000 A
6101880 Face, Jr. et al. Aug 2000 A
6111967 Face, Jr. et al. Aug 2000 A
6112165 Uhl et al. Aug 2000 A
6114797 Bishop et al. Sep 2000 A
6114798 Maruyama et al. Sep 2000 A
6122165 Schmitt et al. Sep 2000 A
6124678 Bishop et al. Sep 2000 A
6127771 Boyd et al. Oct 2000 A
6130625 Harvey Oct 2000 A
6140745 Bryant Oct 2000 A
6144142 Face et al. Nov 2000 A
6150752 Bishop Nov 2000 A
6156145 Clark Dec 2000 A
6175302 Huang Jan 2001 B1
6181225 Bettner Jan 2001 B1
6181255 Crimmins Jan 2001 B1
6182340 Bishop Feb 2001 B1
6188163 Danov Feb 2001 B1
6213564 Face, Jr. Apr 2001 B1
6215227 Boyd Apr 2001 B1
6229247 Bishop May 2001 B1
6243007 McLaughlin et al. Jun 2001 B1
6245172 Face, Jr. Jun 2001 B1
6246153 Bishop et al. Jun 2001 B1
6252336 Hall Jun 2001 B1
6252358 Xydis et al. Jun 2001 B1
6255962 Tanenhaus et al. Jul 2001 B1
6257293 Face, Jr. et al. Jul 2001 B1
6259372 Taranowski et al. Jul 2001 B1
6278625 Boyd Aug 2001 B1
6304176 Discenzo Oct 2001 B1
6323566 Meier Nov 2001 B1
6326718 Boyd Dec 2001 B1
6362559 Boyd Mar 2002 B1
6366006 Boyd Apr 2002 B1
6392329 Bryant et al. May 2002 B1
6396197 Szilagyi et al. May 2002 B1
6407483 Nunuparov et al. Jun 2002 B1
6438193 Ko et al. Aug 2002 B1
6462792 Ban et al. Oct 2002 B1
6529127 Townsend et al. Mar 2003 B2
6567012 Matsubara et al. May 2003 B1
6570336 Ham et al. May 2003 B2
6570386 Goldstein May 2003 B2
6573611 Sohn et al. Jun 2003 B1
6606308 Genest et al. Aug 2003 B1
6611556 Koerner et al. Aug 2003 B1
6614144 Vazquez Carazo Sep 2003 B2
6617757 Vazquez Carazo et al. Sep 2003 B2
6630894 Boyd et al. Oct 2003 B1
6684994 Nunuparov Feb 2004 B1
6700310 Maue et al. Mar 2004 B2
6731708 Watanabe May 2004 B1
6747573 Gerlach et al. Jun 2004 B1
6756930 Nunuparov et al. Jun 2004 B1
6768419 Garber et al. Jul 2004 B2
6785597 Farber et al. Aug 2004 B1
6812594 Face et al. Nov 2004 B2
6856291 Mickle et al. Feb 2005 B2
6861785 Andre et al. Mar 2005 B2
6882128 Rahmel et al. Apr 2005 B1
6933655 Morrison et al. Aug 2005 B2
6980150 Conway, Jr. et al. Dec 2005 B2
6992423 Mancosu et al. Jan 2006 B2
7005778 Pistor Feb 2006 B2
7019241 Grassl et al. Mar 2006 B2
7084529 Face et al. Aug 2006 B2
7230532 Albsmeier et al. Jun 2007 B2
7245062 Schmidt Jul 2007 B2
7389674 Bulst et al. Jun 2008 B2
7391135 Schmidt Jun 2008 B2
7392022 Albsmeier et al. Jun 2008 B2
20010003163 Bungert et al. Jun 2001 A1
20020021216 Vossiek et al. Feb 2002 A1
20020070712 Arul Jun 2002 A1
20030094856 Face et al. May 2003 A1
20030105403 Istvan et al. Jun 2003 A1
20030143963 Pistor et al. Jul 2003 A1
20030193417 Face et al. Oct 2003 A1
20040174073 Face et al. Sep 2004 A9
20040242169 Albsmeier et al. Dec 2004 A1
20050030177 Albsmeier et al. Feb 2005 A1
20050035600 Albsmeier et al. Feb 2005 A1
20050067949 Natarajan et al. Mar 2005 A1
20050087019 Face Apr 2005 A1
20050253486 Schmidt Nov 2005 A1
20050253503 Stegamat et al. Nov 2005 A1
20060018376 Schmidt Jan 2006 A1
20060091984 Schmidt May 2006 A1
20060109654 Coushaine et al. May 2006 A1
20090027167 Pistor et al. Jan 2009 A1
Foreign Referenced Citations (98)
Number Date Country
24 36 225 Feb 1975 DE
24 21 705 Nov 1975 DE
29 43 932 Jun 1980 DE
30 16 338 Nov 1980 DE
29 42 932 May 1981 DE
32 31 117 Feb 1984 DE
36 43 236 Jul 1988 DE
37 36 244 May 1989 DE
40 34 100 Apr 1992 DE
41 05 339 Aug 1992 DE
42 04 463 Aug 1992 DE
42 32 127 Mar 1994 DE
43 09 006 Sep 1994 DE
43 12 596 Oct 1994 DE
44 29 029 Feb 1996 DE
196 19 311 Dec 1996 DE
297 12 270 Jul 1997 DE
196 20 880 Nov 1997 DE
40 17 670 Jan 1998 DE
198 26 513 Dec 1999 DE
100 63 305 Dec 2000 DE
199 55 722 May 2001 DE
103 01 678 Aug 2004 DE
0 119 91 Jun 1980 EP
0 111 632 Jun 1984 EP
0 319 781 Jun 1989 EP
0 468 394 Jan 1992 EP
0 627 716 Apr 1994 EP
0 617 500 Sep 1994 EP
0 656 612 Jun 1995 EP
0 673 102 Sep 1995 EP
0 833 756 Apr 1998 EP
0 960 410 Dec 1999 EP
1 197 887 Apr 2002 EP
2646021 Oct 1990 FR
0 824 126 Nov 1959 GB
2 047 832 Dec 1980 GB
2 047 932 Dec 1980 GB
2 095 053 Sep 1982 GB
2 254 461 Oct 1992 GB
2 259 172 Mar 1993 GB
2 350 245 Nov 2000 GB
175853 Oct 1980 HU
55-147800 Nov 1980 JP
57-174950 Oct 1982 JP
58-072361 Apr 1983 JP
63-078213 Apr 1988 JP
63-131770 Jun 1988 JP
63-180262 Jul 1988 JP
01-091598 Apr 1989 JP
02-040441 Feb 1990 JP
04-012905 Jan 1992 JP
04-321399 Nov 1992 JP
05-009325 Jan 1993 JP
05-064739 Mar 1993 JP
05-175568 Jul 1993 JP
05-251785 Sep 1993 JP
05-284187 Oct 1993 JP
06-212484 Aug 1994 JP
06-233452 Aug 1994 JP
63-016731 Nov 1994 JP
07-226979 Aug 1995 JP
08-132321 May 1996 JP
08-212484 Aug 1996 JP
08-310207 Nov 1996 JP
09-090065 Apr 1997 JP
09-322477 Dec 1997 JP
10-108251 Apr 1998 JP
10-227400 Aug 1998 JP
10-253776 Sep 1998 JP
11-018162 Jan 1999 JP
11-161885 Jun 1999 JP
11-186885 Jul 1999 JP
11-248816 Sep 1999 JP
3060608 Sep 1999 JP
11-341690 Dec 1999 JP
2000-078096 Mar 2000 JP
2000-502828 Mar 2000 JP
2000-297567 Oct 2000 JP
42-061018 Feb 2009 JP
506038 Jun 1973 SU
WO-9425681 Nov 1994 WO
WO-9515416 Jun 1995 WO
WO-9529410 Nov 1995 WO
WO-9615590 May 1996 WO
WO-9628873 Sep 1996 WO
WO-9736364 Oct 1997 WO
WO-9836395 Aug 1998 WO
WO-9854766 Dec 1998 WO
WO-9912486 Mar 1999 WO
WO 9960364 Nov 1999 WO
WO-0002741 Jan 2000 WO
WO-0167580 Sep 2001 WO
WO-0191315 Nov 2001 WO
WO-03049148 Nov 2001 WO
WO-0242873 May 2002 WO
WO-03005388 Jan 2003 WO
WO-03007392 Jan 2003 WO
Non-Patent Literature Citations (48)
Entry
A Distributed, Wireless MEMS Technology for Condition Based Maintenance by Bult et al., Apr. 1996, UCLA and Rockwell Science Center.
Alfredo Vazquez Carazo and Kenji Uchino, “Novel Piezoelectric-Based Power Supply for Driving Piezoelectric Actuators Designed for Active Vibration Damping Applications,” Journal of Electroceramics, vol. 7, No. 3, Dec. 2001, pp. 1-3.
Anonymous, Aerospace Technology Innovation, Technology Transfer “Wafer ‘Wiggle’ Going Places”, vol. 9, No. 3, May/Jun. 2001, retrieved from http://ipp.nasa.gov/innovation/innovation—93/3-tt-wiggle.html, 2 pages.
Anonymous, Microwaves & RF, Jan. 2001; 40, I; Sciences Module p. 5.
Anonymous, Wireless SAW Identification and Sensor Systems 1167-1175, “4. Event-Driven SAW Sensors”, pp. 301-308.
Batteryless Lighting Remote Control, http://www.gpi.ru/˜martin/batteryless—lighting.htm (Unknown Date).
Batteryless Sensor for Intrusion Detection and Assessment of Threats by Gerald F. Ross et al. Nov. 1995, Technical Report, Defense Nuclear Agency.
Colloquium on RF and Microwave Components for Communication Systems, University of Bradford, Apr. 23, 1997, 3 pages.
Einfuhrung in die Technische Informatik und Digitaltechnik, by Dispert, H. et al., FH Kiel, 1995, 23 pgs.
Elektronik 26/1995, Drahtlos identifizieren, 1 pg.
English Abstract for JP45-9325.
English Abstract for JP6233452.
English Abstract JP46-10442.
Frank Schmidt, Enocean GmbH Oberhaching, “Batterielose Funksensoren”, 11. ITG/GMA—Fachtagung Sensoren und Mess-Systeme, Ludwigsburg, Mar. 11-12, 2002, 18 pages.
Halbleifer-Schaltungstechnik, by Tietze, U. et al.; 5. Auflage 1980; pp. 454-455, w/English translation.
Hendrawan Soeleman et al., “Ultra-Low Digital Subthreshold Logic Circuits”, Department of Electrical and Computer Engineering Purdue University, Proceedings of the 1999 International Symposium on low Power Electronics and Design.
How to switch over from any 4 pin SMD SAW resonator to the new EPCOS SAW resonators R8xx in QCC4A SMD package (3.5mm x 5mm) by Glas. A., Dec. 21, 2001, Application Note: SAW-Components, EPCOS AG.
International Search Report and Written Opinion for Application No. PCT/DE01/01965 mailed on Feb. 1, 2002.
J. Hollingum, “Autonomous radio sensor points to new applications”, Sensor Review, vol. 21, No. 2, 2001, pp. 104-106.
J. Paradiso and M. Feldemeier, “A Compact, Wireless, Self-Powered Pushbutton Controller, ” Proc. 3rd Int'l conf. Ubiquitous Computing (Ubicom 2001), Springer-Verlag 2001, 6 pages.
Lehrbuch det Physik, by Grimsehl, E., Band 2, Elektriztatslehre, 21., Auflage, 1988, 320-329.
Non-Final Office Action for U.S. Appl. No. 10/304,121 dated Jan. 22, 2009.
Notice of Allowance dated Mar. 29, 2006 for U.S. Appl. No. 10/188,633.
Office Action dated Oct. 17, 2007 for U.S. Appl. No. 10/304,131.
Office Action for Japan Patent Application No. 2001-586796 (Translated), dated Mar. 9, 2011.
Office Action for Japan Patent Application. No. 2001-586796 (Translated) dated Aug. 25, 2010.
P. Glynne-Jones and N.M. White, “Self-powered systems: a review of energy sources”, Sensor Review, vol. 21, No. 2, 2001, pp. 91-97.
Philips Semiconductors Introduces Ultra Low-Power Real-Time Clock/Calendar Chip; IC Reduces Power Consumption and Helps Reduce Size and Weight of End User Equipment, Business Wire, Apr. 8, 1998.
Piezopower Converter 13 compact power supply that makes electronics batteryless, http://www.gpi.ru/˜piezopower—converter.htm (Unknown Date).
Siemens R&I/Environmentally Sensitive, NewWorld IV/2000, pp. 1-7.
US Advisory Action dated Mar. 20, 2006 for U.S. Appl. No. 10/304,131.
US Office Action dated Jan. 22, 2009 for U.S. Appl. No. 10/304,121.
US Office Action dated Apr. 5, 2006 for U.S. Appl. No. 10/304,131.
US Office Action dated Apr. 26, 2010 for Re-Issue U.S. Appl. No. 12/399,954.
US Office Action dated May 3, 2005 for U.S. Appl. No. 10/304,131.
US Office Action dated Jul. 9, 2008 for U.S. Appl. No. 10/304,131.
US Office Action dated Jul. 13, 2005 for U.S. Appl. No. 10/188,633.
US Office Action dated Sep. 20, 2006 for U.S. Appl. No. 10/304,131.
US Office Action dated Nov. 16, 2005 for U.S. Appl. No. 10/304,121.
US Office Action in U.S. Appl. No. 10/304,131 dated Jun. 3, 2010.
US Office Action in U.S. Appl. No. 12/248,682 dated Feb. 17, 2010.
US Office Action in U.S. Appl. No. 12/248,682 dated Aug. 25, 2010.
US Office Action in U.S. Appl. No. 13/034,491 dated Oct. 27, 2011.
US Office Action in U.S. Appl. No. 13/456,994 dated Aug. 1, 2012.
US Office Action issued Jul. 22, 2009 in U.S. Appl. No. 10/304,121.
US Office Action DTD Sep. 11, 2013.
Vandana Sinha, “Virginia-Based Electronics Research Firm to Work Manufacturer on Remotes”, The Virginian-Pilot, Nov. 17, 2001, pp. 1-2.
US Office Action on U.S. Appl. No. 10/304,121, dated Oct. 5, 2016.
Related Publications (1)
Number Date Country
20140364074 A1 Dec 2014 US
Continuations (6)
Number Date Country
Parent 13756925 Feb 2013 US
Child 14202947 US
Parent 13456994 Apr 2012 US
Child 13756925 US
Parent 13034491 Feb 2011 US
Child 13456994 US
Parent 12248682 Oct 2008 US
Child 13034491 US
Parent 10304121 Nov 2002 US
Child 12248682 US
Parent PCT/DE01/01965 May 2001 US
Child 10304121 US