Point-of-sale system including isolation layer between client and server software

Information

  • Patent Grant
  • RE40576
  • Patent Number
    RE40,576
  • Date Filed
    Wednesday, June 12, 2002
    22 years ago
  • Date Issued
    Tuesday, November 18, 2008
    16 years ago
Abstract
A system and method of transferring information between a first software application and a second software application which employ an isolation layer. The system includes a client computer system provided by a first seller of computer systems, including a client software application, and a server computer system provided by a second seller of computer systems different from the first seller of computer systems, including a server software application which provides information from the server computer system to the client computer system. The system additionally includes isolation layer software, either at the client computer system or at the server computer system, which facilitates communication between the client software application and the server software application to transfer the information.
Description
BACKGROUND OF THE INVENTION

The present invention relates to point-of-sale (POS) systems, and more specifically to a POS system including an isolation layer between POS server software and a client POS application program.


POS systems typically include a central server and a plurality of checkout terminals connected through a client-server network.


The checkout terminals include bar code readers and keyboards for entry of the item numbers during a transaction.


The central server stores a price look-up (PLU) file which associates item numbers with item prices. The central server processes requests from the checkout terminals for price information for the items. The central server may perform additional tasks, such as storing transaction history (audit log and transaction totals history), storing accountability totals, storing cashier and terminal accountability totals, holding future price change information (batches), performing credit authorization, performing check validation, and performing frequent shopper validation and specials.


POS checkout software has traditionally included client and server software that have been developed together and sold as a single proprietary product. However, this solution may not be an optimal one for a retailer. Retailers may find that combining server software from one developer with client software from another developer gives their POS systems the features that they want. This may be especially true for retailers that want the best solutions for both the server and client software in a market where no one developer of proprietary POS software exceeds at both.


Therefore, it would be desirable to provide a POS system including an isolation layer between the POS server software and the POS client application software to enable server and client software from different developers to be combined.


SUMMARY OF THE INVENTION

In accordance with the teachings of the present invention, a POS system including an isolation layer between POS server software and a client POS application program is provided.


A system and method of transferring information between a first software application and a second software application which employ an isolation layer. The system includes a client computer system provided by a first seller of computer systems, including a client software application, and a server computer system provided by a second seller of computer systems different from the first seller of computer systems, including a server software application which provides information from the server computer system to the client computer system. The system additionally includes isolation layer software, either at the client computer system or at the server computer system, which facilitates communication between the client software application and the server software application to transfer the information.


The method includes the steps of providing the first software application by a first computer, providing the second software application by a second company different from the first company, executing the first software application by a first computer, executing the second software application by a second computer different from the first computer, providing an isolation layer having hooks into the second software application, executing the isolation layer, and establishing communication between the first software application and the second software application by the isolation layer to transfer the information.


It is accordingly an object of the present invention to provide a POS system including as isolation layer between POS server software and a client POS application program.


It is another object of the present invention to allow server and client software from different developers to be combined using an isolation layer.


It is another object of the present invention to provide an isolation layer for server software that provides read and write services for client POS software in a computer network that includes client computers running different client POS software.





BRIEF DESCRIPTION OF THE DRAWINGS

Additional benefits and advantages of the present invention will become apparent to those skilled in the art to which this invention relates from the subsequent description of the preferred embodiments and the appended claims, taken in conjunction with the accompanying drawings, in which:



FIG. 1 is a block diagram of a transaction management system;



FIG. 2 is a block diagram illustrating the client POS software, server POS software, and the isolation layer between them;



FIG. 3 is a block diagram of a system for producing the isolation layer;



FIG. 4 is a flow diagram illustrating how the isolation layer is created; and



FIG. 5 is a flow diagram illustrating operation of a system specific application and, in particular, a method of transferring information from the system specific application to the client POS software through the isolation layer.





DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring now to FIG. 1, transaction system 10 preferably includes host computer system 12 and point-of-service (POS) terminal 22A and 22B. Host computer system 12 and point-of-service (POS) terminals 22A and 22B are coupled together to form a network.


POS terminals 22A and 22B execute independent applications 23A and 23B, including client POS software 24A and 24B for completing transactions. POS software 24A and 24B may be identical (e.g. the same application from the same developer) or may be different transaction processing applications.


As illustrated, independent applications 23A were developed by a different developer than the developer of server POS software 16. Thus, independent applications 23A require isolation layer 14 to communication with POS server software 16. Independent applications 23B were developed by the same developer as the developer of POS server software 16. Thus, independent applications 23B do not require isolation layer 14 to communication with server POS software 16. Advantageously, the present invention is capable of connecting a plurality of independent applications 23A running on a plurality of different client terminals from different developers to server POS software 16.


Client POS software 24A and 24B display transaction information on displays 27A, 27B. Client POS software 24A and 24B receive article identification information from bar code readers 26A, 26B and keyboards 28A, 28B. Client POS software 24A and 24B send the article identification information to host computer system 12. Host computer system 12 reads price look-up (PLU) file 20 to obtain price information and sends the price information to POS terminals 26A and 26B.


Other examples of independent applications 17 include price checking software for consumer price checking computers, weighing software for electronic scales, price checking software and item description label printing software for hand-held terminals, and EPL auditing software.


Host computer system 12 executes POS server software 16 and isolation layer 14. POS server software 16 processes requests from independent applications 23A and 23B. POS server software 16 includes system specific applications 17, such as price look-up (PLU) file software 40, transaction totals software 42, cashier authentication software 44, and credit checking software 46. These are but examples of system specific software in use today. The present invention anticipates other types of system specific software 17 as well.


Isolation layer 14 provides translation services between independent applications 23A and server POS software 16. Thus, isolation layer 14 allows client POS software 24A from one developer to function with system specific applications 17 from a different developer.


Isolation layer 14 may reside in host computer system 12 or client terminal 22A. Typically, a provider of client terminals 22A also provides independent applications 23A, and a provider of host computer system 12 also provides server POS software 16.


If the provider of client terminals 22A is adding client terminals 22A to an existing network including a server from a different provider, the provider of client terminals 22A may wish to write and store isolation layer 14 in client terminals 22A.


On the other hand, if a provider of servers and server POS software 16 is adding host computer system 12 to an existing network including client terminals 22A from a different provider, the provider of servers may wish to write and store isolation layer 14 in host computer system 12.


Isolation layer 14 preferably includes one library file for all system specific applications 17 or individual library files for system specific applications 17. Use of multiple libraries adds network design flexibility but penalizes operation by loading each library into memory, even if only part of isolation layer 14 is used. Isolation layer 14 may take other forms including a single application, a single driver, or multiple drivers that perform read operations into server POS software 16 in order to obtain and map information to be used by client POS software 24A. Theses drivers also perform writes into server POS software 16 may information created by client POS software 24A.


Storage medium 18 stores PLU file 20 and other information files and is preferably a fixed disk drive.


Turning now to FIG. 2, the software architecture within system 10 is described in more detail. Discussion references client POS software 24A, but other independent applications 23A operate in a similar fashion.


Client POS software 24A includes POS checkout application software 30 and interprocess communications (IPC) software 32. POS checkout software 30 records items by scanning them, prints them on a receipt, and adds their prices to produce a total transaction amount. POS checkout software 30 also performs specific transaction-related functions, such as processing food stamps and other forms of payment under government entitlement programs, calculating service charges, performing price change functions, performing out of transaction functions (loans, pickups), etc. An example of POS checkout software 30 is the UNITY® checkout application developed and sod by the Assignee of the present invention.


IPC software 32 is software that is added to POS checkout software 30 to facilitate interprocess communications (IPC) between POS checkout software 30 and isolation layer 14. IPC software 32 will vary with operating system, from threads, queues, named pipes, shared files, sockets, etc.


Isolation layer 14 includes read/write engine and translation layer 34 and read/write layer 36. Read/write engine and translation layer 34 translates one request into one or more read/write requests as needed for host computer system 12 based on standard server inputs and custom outputs. Read/write layer 36 performs the actual reads and writes to host computer system 12 based on the requests issued in read/write engine and translation layer 34.


An example of read/write layer 36 is the UNITY® file service layer.


Server POS software 16 may include both the UNITY® file service layer and the UNIX® file system.


In a traditional POS system, client POS software communicates directly with POS server software through a communication methodology, such as named pipes. Under Applicant's invention, client POS software 24A is modified to include IPC software 32, and an isolation layer 14 is added. Communication between client POS software 24A and POS server software 16 occurs between IPC software and isolation layer 14.


Turning now to FIG. 3, the components that are used to construct isolation layer 14 include templates 60, object code 62, example mappings and translations 64, target routines 66, and make files 68 for each of system-specific applications 17. Templates 60 are a super set of example mappings and translations 64 and target routines 66. Isolation layer 14 includes templates 60 for each of system specific application 17. Example mappings and translations 64 and target routines 66 are edited and customized by developers to produce customized mappings and translations 65 and customized target routines 67 (customized templates 61). Customized mappings and translations 65 and customized target routines 67 along with object code 62 are fed into make files 68 in order to produce executable code for isolation layer 14.


Object code 62 consists of libraries 41 for each of system specific applications 17. As mentioned above, isolation layer 14 may include one library for establishing communication for all system specific applications 17 or a plurality of separate libraries.


Example mappings and translations 64 provide non-displayable information (in code and/or in documentation) and may be edited to customize isolation layer 14.


Target routines 66 are system specific application routines that may be edited and customized to suit the needs of the target transaction establishment.


Make files 68 are files that pass source code (templates 60) through compiler 72 and then pass object code 62 through linker 74 to produce the target executable.


Turning now to FIG. 4, the method of creating isolation layer 14 begins with START 80.


In step 82, independent applications 23A are isolated from system specific applications 17 through a non-displayable mapping determination and translation process. Example mappings and translations 64 result.


In step 84, a template 60 for one of system specific applications 17 is provided. Template 60 is packaged in an installable format that can then be distributed and installed on the target system.


In step 86, customized mappings and translations 65 and customized target routines 67 are determined.


In steps 88-92, customized template 61 is produced by changing template 60 to reflect customized mappings and translations 65.


In step 88, functions to be implemented are edited. For example, for PLU file reader software 40, the “read first”, “read next”, and “read specific” sections are edited. The “read first” section is a routine that must be completed/customized to read the first PLU in PLU file 20. The “read next” section is a routine that must be completed/customized to read the next PLU in PLU file 20 sequentially. The “read specific” section is a routine that must be completed/customized to read a specific PLU file record.


In step 90, customized mapping and translations 65 and customized target routines 67 derived from step 86 are applied to template 60.


In step 92, operation returns to step 84 if library functionality for an additional specific application 17 must be added. Otherwise, operation continues to step 94.


In step 94, a new executable (isolation layer 14) is complied and linked from object code 62 and templates 61 for each of system specific applications 17 using make files 68, compiler 72, and linker 74.


In step 96, the method ends.


Referring now to FIG. 5, operation of a system specific application 17 is illustrated in detail, beginning with START 100. In particular, operation illustrates a method of transferring information between a terminal 22A and host computer system 12 through isolation layer 14.


In step 102, a system specific application 17 starts up and configures itself.


In step 104, system specific application 17 waits for an interprocess communications message from isolation layer 14. Interprocess communication services (e.g., “queues” for UNIX, threads or pipes for OS/2) are provided by the operating system executed by host computer system 12.


Isolation layer 14 calls on the operating system to send a request from client POS software 24A to system specific application 17. Client POS software 24A issues a call to isolation layer 14, instructing isolation layer 14 to perform a routine provided by isolation layer 14 and related to the purpose of system specific application 17.


For example, when system specific application 17 is PLU file reader software 40, the routine would be a “read direct” routine within isolation layer 14. Isolation layer 14 calls on the operating system to send the interprocess communications message to system specific application 17.


If such a message is received, system specific application 17 determines whether the interprocess communications message contains an “exit” command in step 105. If it does, system specific application 17 terminates in step 116.


If the interprocess communications message does not contain an “exit” command, system specific application 17 obtains the information from its source in step 106. For example, if system specific application 17 is PLU file reader software 40, system specific application 17 uses operating system 52 to obtain the information from PLU file 20.


In step 114, system specific application 17 calls on the operating system to return the information via interprocess communications to the client POS software 24A via isolation layer 14. System specific application 17 returns to a waiting state in step 104.


After system specific application 17 sends the information to isolation layer 14, isolation layer 14 passes the information to client POS software 24A. Client POS software application 24A can then display the information, compare the information, or otherwise examine the information in accordance with the functions of client POS software 24A.


Although the present invention has been described with particular reference to certain preferred embodiments thereof, variations and modifications of the present invention can be effected within the spirit and scope of the following claims.

Claims
  • 1. A transaction system comprising: a client computer system provided by a first seller of computer systems, including a client software application; and a server computer system provided by a second seller of computer systems different from the first seller of computer systems, including a server software application which provides information from the server computer system to the client computer system and isolation layer software which facilitates communication between the client software application and the server software application to transfer the information between the client software application and the server software application, the isolation layer providing translation for commands and data communicated between the client software application and the server software application, the isolation layer including a translation layer producing custom outputs for communicating between the client software application and the server software application, the custom outputs being based on customized mappings and translations directed to facilitating communication between the client software application and the server software application.
  • 2. A transaction system comprising: a server computer system provided by a first seller of computer systems, including a server software application; and a client computer system provided by a second seller of computer systems different from the first seller of computer systems, including a client software application which obtains information from the server computer system and isolation layer software which facilities communication between the client software application and the server software application to transfer the information between the client software application and the server software application, the isolation layer providing translation for commands and data communicated between the client software application and the server software application, the isolation layer including a translation layer producing custom outputs for communicating between the client software application and the server software application, the custom outputs being based on customized mappings and translations directed to facilitating communication between the client software application and the server software application.
  • 3. A method of transferring information between a first software application and a second software application comprising the steps of: (a) providing the first software application by a first company; (b) providing the second software application by a second company different from the first company; (c) executing the first software application by a first computer; (d) executing the second software application by a second computer different from the first computer; (e) providing an isolation layer having hooks into the second software application, the isolation layer providing translation for commands and data communicated between the first software application and the second software application, the isolation layer including a translation layer producing custom outputs for communicating between the first software application and the second software application, the custom outputs being based on customized mappings and translations directed to facilitating communication between the first software application and the second software application; (f) executing the isolation layer; and (g) establishing communication between the first software application and the second software application by the isolation layer to transfer the information.
  • 4. The method as recited in claim 3, wherein step f comprises the substep of: (f) executing the isolation layer by the first computer.
  • 5. The method as recited in claim 3, wherein step f comprises the substep of: (f) executing the isolation layer by the second computer.
  • 6. A method of transferring information between a client software application and a server software application comprising the steps of: (a) installing a client computer by a first company; (b) providing and installing the client software application by the first company; (c) installing a server computer by a second company different from the first company after installation of the client computer and the client software by the first company; (d) providing and installing the server software application by the second company; (e) providing and installing an isolation layer having hooks into the server software application by the second company, the isolation layer providing translation for commands and data communicated between the client software application and the server software application, the isolation layer including a translation layer producing custom outputs for communicating between the client software application and the server software application, the custom outputs being based on customized mappings and translations directed to facilitating communication between the client software application and the server software applications; (f) executing the client software application by the client computer; (g) executing the server software application and the isolation layer by the server computer; and (h) establishing communication between the client software application and the server software application by the isolation layer to transfer the information.
  • 7. A method of transferring information between a client software application and a server software application comprising the steps of: (a) installing a server computer by a first company; (b) providing and installing the server software application by the first company; (c) installing a client computer by a second company different from the first company after installation of the server computer and the server software by the first company; (d) providing and installing the client software application by the second company; (e) providing and installing an isolation layer having hooks into the server software application by the second company, the isolation layer providing translation for commands and data communicated between the client software application and the server software application, the isolation layer including a translation layer producing custom outputs for communicating between the client software application and the server software application, the custom outputs being based on customized mappings and translations directed to facilitating communication between the client software application and the server software application; (f) executing the client software application and the isolation layer by the client computer; (g) executing the server software application by the server computer; and (h) establishing communication between the client software application and the server software application by the isolation layer to transfer the information.
  • 8. A method of obtaining information for a client software application from a server software application comprising the steps of: (a) providing the client software application from a first company; (b) providing a server software application for accessing the information by a second company different from the first company; (c) providing an isolation layer between the client software application and the server software application, the isolation layer providing translation for commands and data communicated between the client software application and the server software application, the isolation layer including a translation layer producing custom outputs for communicating between the client software application and the server software application, the custom outputs being based on customized mappings and translations directed to facilitating communicating between the client software application and the server software application; (d) sending a call for the information to the isolation layer by the client software application; (e) sending a request message for the information to the server software application by the isolation layer; (f) instructing control software to obtain the information by the server software application; (g) sending the information to the isolation layer by the server software application; and (h) sending the information to the client software application by the isolation layer.
  • 9. The transaction system of claim 1 in which the client computer system comprises a first POS client terminal communicating with the server computer system through the isolation layer software, and in which the transaction system further comprises a second client computer system including a second POS client terminal that communicates with the server software application on the server computer system without requiring isolation layer software as required by the first POS client terminal.
  • 10. The transaction system of claim 9 in which the first and second POS client terminals respectively run different POS client software applications from different developers and with different requirements for communicating with the server computer system.
  • 11. The transaction system of claim 1 in which the client computer system comprises a first POS client terminal communicating with the server computer system through the isolation layer software, and in which the transaction system further comprises a second client computer system including a second POS client terminal communicating with the server computer system through different, custom isolation layer software.
  • 12. The transaction system of claim 11 in which the first and second POS client terminals respectively run different POS client software applications from different developers and with different requirements for communicating with the server computer system.
  • 13. The transaction system of claim 1 in which the client computer system comprises a first POS client terminal communicating with the server computer system through the isolation layer software, and in which the transaction system further comprises a second client computer system including a second POS client terminal communicating with the server computer system through different, custom isolation layer software.
  • 14. The transaction system of claim 13 in which the first and second POS client terminals respectively run different POS client software applications from different developers and with different requirements for communicating with the server computer system.
  • 15. A method of providing the transaction system of claim 1 in which the client software application and the server software application are POS software, and enabling client terminals with POS client application software from different developers to be connected to and communicate with the server software application on the server computer system, which comprises the following steps: providing the client computer system including a client terminal adding to an existing POS system network of which the server computer system is a part, where the existing network includes a second client computer system with a client terminal running a POS client software application not requiring the isolation layer software to communicate with the server software application on the server computer system; and providing the isolation layer software to provide translation services for the client terminal adding to the existing POS system network, to facilitate communications with the server software application on the server computer system.
  • 16. A method of providing the transaction system of claim 1 in which the client software application and the server software application are POS software, comprising the step of providing the client computer system including a client terminal adding to an existing POS system network in which the server computer system is included, and in which the network includes a second client computer system, including a client terminal running a POS client software application not requiring the isolation layer software to communicate with the server software application running on the server computer system.
  • 17. A method of providing the transaction system of claim 1, in which the client software application and the server software application are POS software, and enabling client terminals with POS client application software from different developers to be connected to and communicate with the server software application on the server computer system, comprising the step of providing the client computer system including a first POS client terminal adding to an existing POS system network of which the server computer system is a part, where the existing network includes a second client computer system with a second POS client terminal running a POS client software application requiring isolation layer software different than required by the first client terminal to communicate with the server software application on the server computer system.
  • 18. A method of providing the transaction system of claim 1 in which the client software application and the server software application are POS software, comprising the step of providing the server computer system as part of a host computer system added to an existing POS system network in which the client computer system is included.
  • 19. The method of claim 18 that comprises the further steps of writing the isolation layer software to provide translation services between the client software application and the server software application, and storing the isolation layer software on the host computer system added to the existing POS system network.
  • 20. The method of claim 18 in which the isolation layer software provides read and write services for the client software application.
  • 21. The method of claim 18 in which the client computer system includes IPC software facilitating inter-process communications between the client software application and the isolation layer software.
  • 22. The transaction system of claim 2 in which the client computer system comprises a first POS client terminal communicating with the server computer system through the isolation layer software, and in which the transaction system further comprises a second client computer system including a second POS client terminal that communicates with the server software application on the server computer system without requiring isolation layer software as required by the first POS client terminal.
  • 23. The transaction system of claim 22 in which the first and second POS client terminals respectively run different POS client software applications from different developers and with different requirements for communicating with the server computer system.
  • 24. A method of providing the transaction system of claim 2 in which the client software application and the server software application are POS software, and enabling client terminals with POS client application software from different developers to be connected to and communicate with the server software application on the server computer system, which comprises the following steps: providing the client computer system including a client terminal adding to an existing POS system network of which the server computer system is a part, where the existing network includes a second client computer system with a client terminal running a POS client software application not requiring the isolation layer software to communicate with the server software application on the server computer system; and providing the isolation layer software to provide translation services for the client terminal adding to the existing POS system network, to facilitate communications with the server software application on the server computer system.
  • 25. A method of providing the transaction system of claim 2 in which the client software application and the server software application are POS software, comprising the step of providing the client computer system including a client terminal adding to an existing POS system network in which the server computer system is included, and in which the network includes a second client computer system, including a client terminal running a POS client software application not requiring the isolation layer software to communicate with the server software application running on the server computer system.
  • 26. A method of providing the transaction system of claim 2, in which the client software application and the server software application are POS software, and enabling client terminals with POS client application software from different developers to be connected to and communicate with the server software application on the server computer system, comprising the step of providing the client computer system including a first POS client terminal adding to an existing POS system network of which the server computer system is a part, where the existing network includes a second client computer system with a second POS client terminal running a POS client software application requiring isolation layer software different than required by the first client terminal to communicate with the server software application on the server computer system.
  • 27. A method of providing the transaction system of claim 2 in which the client software application and the server software application are POS software, comprising the step of providing the client computer system including a client terminal added to an existing POS system network in which the server computer system is included.
  • 28. The method of claim 27 in which the isolation layer software provides read and write services for the client software application.
  • 29. The method of claim 27 in which the client computer system includes IPC software facilitating inter-process communications between the client software application and the isolation layer software.
  • 30. The method of claim 27 that comprises the further steps of writing the isolation layer software to provide translation services between the client software application and the server software application, and storing the isolation layer software on the client terminals added to the existing POS system network.
  • 31. The method of claim 30 in which the isolation layer software is written by compiling sample target routines that have been edited and customized to meet the needs of a target transaction establishment.
  • 32. The method of claim 30 in which the client computer system includes a plurality of different independent software applications running on a plurality of different client terminals from different developers.
  • 33. The method of claim 32 in which the client computer system includes client terminals running independent software applications developed by the same developer as the server software application and not requiring isolation layer software to communicate with the server software application, and client terminals running independent software applications developed by a developer different from the server software application and using isolation layer software to communicate with the server software application.
  • 34. The method of claim 29 for which communications between the server computer system and the added client POS computer terminal occurs between interprocess communications software and the isolation layer software.
CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is related to the U.S. Pat. No. 5,839,116 issued on Nov. 17, 1998, entitled “SYSTEM AND METHOD OF OBTAINING INFORMATION FROM A PRICE LOOK-UP FILE”, and having as inventor, John Goodwin.

US Referenced Citations (235)
Number Name Date Kind
3182357 Tuttle May 1965 A
3263774 Reese Aug 1966 A
3436968 Unger Apr 1969 A
3681570 Abt Aug 1972 A
3681571 Strohschneider Aug 1972 A
3688873 Potrafke Sep 1972 A
3696586 Sparks Oct 1972 A
3725895 Haynes Apr 1973 A
3735350 Lemelson May 1973 A
3819012 Beck, Jr., et al. Jun 1974 A
3836755 Ehrat Sep 1974 A
3869575 Spitz, et al. Mar 1975 A
3878365 Schwartz Apr 1975 A
3947817 Requa, deceased et al. Mar 1976 A
3949194 Catto et al. Apr 1976 A
3962569 Loshbough et al. Jun 1976 A
3962570 Loshbough et al. Jun 1976 A
3984667 Loshbough Oct 1976 A
3986012 Loshbough et al. Oct 1976 A
4004139 Hall Jan 1977 A
4028537 Snow Jun 1977 A
4069970 Buzzard et al. Jan 1978 A
4071740 Gogulski Jan 1978 A
4084742 Silverman Apr 1978 A
4114721 Glenn, Jr. Sep 1978 A
4138000 Hartup Feb 1979 A
4177880 Joseloff Dec 1979 A
4180204 Koenig et al. Dec 1979 A
4236604 Warner Dec 1980 A
4237483 Clever Dec 1980 A
4327819 Coutta May 1982 A
4347903 Yano et al. Aug 1982 A
4353564 Joseloff Oct 1982 A
4369334 Nakatani et al. Jan 1983 A
4369361 Swartz et al. Jan 1983 A
4373133 Clyne et al. Feb 1983 A
4377741 Brekka et al. Mar 1983 A
4392535 Fujii et al. Jul 1983 A
4412298 Feinland et al. Oct 1983 A
4500880 Gomersall et al. Feb 1985 A
4509129 Yatsunami et al. Apr 1985 A
4529871 Davidson Jul 1985 A
4549867 Dittakavi Oct 1985 A
4574317 Scheible Mar 1986 A
4583083 Bogasky Apr 1986 A
4583619 Fry Apr 1986 A
4602152 Dittakavi Jul 1986 A
4605080 Lemelson Aug 1986 A
4660160 Tajima et al. Apr 1987 A
4661908 Hamano et al. Apr 1987 A
4676343 Humble et al. Jun 1987 A
4679154 Blanford Jul 1987 A
4688105 Bloch et al. Aug 1987 A
4709770 Kohashi et al. Dec 1987 A
4715457 Amacher et al. Dec 1987 A
4723118 Hooley et al. Feb 1988 A
4725822 Hooley Feb 1988 A
4729097 Takaoka et al. Mar 1988 A
4734713 Sato et al. Mar 1988 A
4736098 Rehrig Apr 1988 A
D296788 Schneider et al. Jul 1988 S
4766296 Barth Aug 1988 A
4766299 Tierney et al. Aug 1988 A
4775782 Mergenthaler et al. Oct 1988 A
4779706 Mergenthaler Oct 1988 A
4787467 Johnson Nov 1988 A
4789048 Cramer et al. Dec 1988 A
4792018 Humble et al. Dec 1988 A
4800493 Takagi Jan 1989 A
4838383 Saito et al. Jun 1989 A
4855908 Shimoda et al. Aug 1989 A
4866661 de Prins Sep 1989 A
4881606 Halfon et al. Nov 1989 A
4909356 Rimondi et al. Mar 1990 A
4914280 Peterson Apr 1990 A
4929819 Collins, Jr. May 1990 A
4940116 O'Connor et al. Jul 1990 A
4947028 Gorog Aug 1990 A
4959530 O'Connor Sep 1990 A
4964053 Humble Oct 1990 A
4964167 Kunizawa et al. Oct 1990 A
4971177 Nojiri et al. Nov 1990 A
4975948 Andresen et al. Dec 1990 A
5004916 Collins, Jr. Apr 1991 A
5040636 Forsythe et al. Aug 1991 A
5053636 Zelina Oct 1991 A
5058691 Sela Oct 1991 A
5079412 Sugiyama Jan 1992 A
5083638 Schneider Jan 1992 A
5115888 Schneider May 1992 A
5121103 Minasy et al. Jun 1992 A
5123494 Schneider Jun 1992 A
5125465 Schneider Jun 1992 A
5139100 Brauneis Aug 1992 A
5140145 Bianco Aug 1992 A
5142161 Brackmann Aug 1992 A
5149211 Pettigrew et al. Sep 1992 A
5168961 Schneider Dec 1992 A
5174399 Brauneis Dec 1992 A
5174413 Cappi et al. Dec 1992 A
5177345 Baitz Jan 1993 A
5177800 Coats Jan 1993 A
5178234 Sakurai et al. Jan 1993 A
5189291 Siemiatkowski Feb 1993 A
5191749 Cappi et al. Mar 1993 A
5195613 Kohno Mar 1993 A
5230391 Murata et al. Jul 1993 A
5231293 Longacre, Jr. Jul 1993 A
5239167 Kipp Aug 1993 A
5250789 Johnsen Oct 1993 A
5256864 Rando et al. Oct 1993 A
5265075 Bergeron et al. Nov 1993 A
5293319 DeSha et al. Mar 1994 A
5297030 Vassigh et al. Mar 1994 A
5314631 Katoh et al. May 1994 A
5315097 Collins, Jr. et al. May 1994 A
5334826 Sato et al. Aug 1994 A
5335171 Fuyama Aug 1994 A
5340970 Wolfe, Jr. et al. Aug 1994 A
5343025 Usui Aug 1994 A
5345071 Dumont Sep 1994 A
5361871 Gupta et al. Nov 1994 A
5365050 Worthington et al. Nov 1994 A
5374815 Waterhouse et al. Dec 1994 A
5375680 Ikeda et al. Dec 1994 A
5378860 Dingfelder et al. Jan 1995 A
5382779 Gupta Jan 1995 A
5393965 Bravman et al. Feb 1995 A
5397882 Van Solt Mar 1995 A
5398191 Komai Mar 1995 A
5406063 Jelen Apr 1995 A
5410108 Williams et al. Apr 1995 A
5412191 Baitz et al. Apr 1995 A
5424521 Wolfe, Jr. et al. Jun 1995 A
5424524 Ruppert et al. Jun 1995 A
5426282 Humble Jun 1995 A
5426423 Raimbault et al. Jun 1995 A
5434394 Roach et al. Jul 1995 A
5437346 Dumont Aug 1995 A
5448046 Swartz Sep 1995 A
5448226 Failing, Jr. et al. Sep 1995 A
5454063 Rossides Sep 1995 A
5457307 Dumont Oct 1995 A
5461561 Ackerman et al. Oct 1995 A
5478989 Shepley Dec 1995 A
5482139 Rivalto Jan 1996 A
5484991 Sherman et al. Jan 1996 A
5485006 Allen et al. Jan 1996 A
5488202 Baitz et al. Jan 1996 A
5489773 Kumar Feb 1996 A
5493107 Gupta et al. Feb 1996 A
5493613 Denno et al. Feb 1996 A
5494136 Humble Feb 1996 A
5497314 Novak Mar 1996 A
5497853 Collins, Jr. et al. Mar 1996 A
5500890 Rogge et al. Mar 1996 A
5525786 Dumont Jun 1996 A
5540301 Dumont Jul 1996 A
5541925 Pittenger et al. Jul 1996 A
5543607 Watanabe et al. Aug 1996 A
5544040 Gerbaulet Aug 1996 A
5546475 Bolle et al. Aug 1996 A
5560450 Kouno Oct 1996 A
5577165 Takebayashi et al. Nov 1996 A
5579000 Mulqueen Nov 1996 A
5594469 Freeman et al. Jan 1997 A
5595264 Trotta, Jr. Jan 1997 A
5609223 Iizaka et al. Mar 1997 A
5635906 Joseph Jun 1997 A
5637847 Watanabe Jun 1997 A
5644630 Durco, Jr. Jul 1997 A
5662190 Abe Sep 1997 A
5663963 Goodwin, III et al. Sep 1997 A
5684289 Detwiler et al. Nov 1997 A
5708782 Larson et al. Jan 1998 A
5710887 Chelliah et al. Jan 1998 A
5721420 May Feb 1998 A
5721536 Mulqueen Feb 1998 A
RE35758 Winter et al. Mar 1998 E
5734823 Saigh et al. Mar 1998 A
5736721 Swartz Apr 1998 A
5740744 Nashirozawa et al. Apr 1998 A
5745705 Iguchi Apr 1998 A
5747784 Walter et al. May 1998 A
5752582 Hayward May 1998 A
5754106 Goodwin, III May 1998 A
5756978 Soltesz et al. May 1998 A
5756984 Kobayashi May 1998 A
5769269 Peters Jun 1998 A
5780825 Sato et al. Jul 1998 A
5784446 Stuart Jul 1998 A
5801371 Kahn et al. Sep 1998 A
5801766 Alden Sep 1998 A
5814799 Swartz et al. Sep 1998 A
5821512 O'Hagan et al. Oct 1998 A
5832417 Petrucelli et al. Nov 1998 A
5832457 O'Brien et al. Nov 1998 A
5837991 LaManna et al. Nov 1998 A
5839104 Miller et al. Nov 1998 A
5839116 Goodwin, III Nov 1998 A
5845259 West et al. Dec 1998 A
5845263 Camaisa et al. Dec 1998 A
5877485 Swartz Mar 1999 A
5878064 Goodwin, III Mar 1999 A
5883968 Welch et al. Mar 1999 A
5884281 Smith et al. Mar 1999 A
5884728 d'Estaintot et al. Mar 1999 A
5886336 Tang et al. Mar 1999 A
5890135 Powell Mar 1999 A
5898158 Shimizu et al. Apr 1999 A
5898383 Forsythe Apr 1999 A
5900614 Nakakawaji et al. May 1999 A
5901204 Gallacher et al. May 1999 A
5914473 Gresky Jun 1999 A
5917421 Saunders Jun 1999 A
5923735 Swartz et al. Jul 1999 A
5925872 Wyatt et al. Jul 1999 A
5950173 Perkowski Sep 1999 A
5965861 Addy et al. Oct 1999 A
5970470 Walker et al. Oct 1999 A
5978772 Mold Nov 1999 A
5979757 Tracy et al. Nov 1999 A
5984177 Do et al. Nov 1999 A
5987428 Walter Nov 1999 A
5992570 Walter et al. Nov 1999 A
5993047 Novogrod et al. Nov 1999 A
6000522 Johnson Dec 1999 A
6002808 Freeman Dec 1999 A
6009538 Goodwin, III et al. Dec 1999 A
6056087 Addy et al. May 2000 A
6056194 Kolls May 2000 A
6080938 Lutz Jun 2000 A
6108717 Kimura et al. Aug 2000 A
6163797 Eckley et al. Dec 2000 A
6269342 Brick et al. Jul 2001 B1
Foreign Referenced Citations (17)
Number Date Country
899018 Jun 1984 BE
1927819 Feb 1971 DE
2125869 Dec 1972 DE
3114139 Nov 1982 DE
3330301 Mar 1985 DE
0060701 Sep 1982 EP
0124355 Nov 1984 EP
0178223 Apr 1986 EP
0199232 Oct 1986 EP
0491348 Jun 1992 EP
0767437 Apr 1997 EP
0811958 Dec 1997 EP
2068132 Aug 1981 GB
2285687 Jul 1995 GB
5314367 Nov 1993 JP
9107725 May 1991 WO
9415294 Jul 1994 WO
Reissues (1)
Number Date Country
Parent 08949410 Oct 1997 US
Child 10171366 US