using trains of dc pulses

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H04Q1/32

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HELECTRICITY H04Electric communication H04QSELECTING H04Q1/00Details of selecting apparatus or arrangements for establishing connections among stations for the purpose of transferring information via these connections

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H04Q1/32using trains of dc pulses

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Patents Grantslast 30 patents

Information Patent Grant
Telephone line monitoring apparatus and method
- Patent number 5,553,116
- Issue date Sep 3, 1996
- Teletron Ltd.
- Shlomo Avni
- G01 - MEASURING TESTING
Information Patent Grant
Telephone line monitoring apparatus and method
- Patent number 5,347,572
- Issue date Sep 13, 1994
- Teletron Ltd.
- Shlomo Avni
- G01 - MEASURING TESTING
Information Patent Grant
Device for connecting a subscriber line to a selected internal line
- Patent number 5,144,652
- Issue date Sep 1, 1992
- Johannes H. M. Smits
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Rotary dial pulse receiver
- Patent number 4,944,001
- Issue date Jul 24, 1990
- Comcheq Services Limited
- Brent L. Kizuik
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Dial pulse selection
- Patent number 4,924,501
- Issue date May 8, 1990
- British Telecommunications plc
- David S. Cheeseman
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Ring detector for telephone line
- Patent number 4,920,561
- Issue date Apr 24, 1990
- Scully Signal Company
- Andrew C. Mitchell
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Pulse detector for counting dial generated pulses
- Patent number 4,868,873
- Issue date Sep 19, 1989
- Aerotel Israel
- Zvi Kamil
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Method for determining telephone dial pulse parameters independentl...
- Patent number 4,839,920
- Issue date Jun 13, 1989
- Siemens Aktiengesellschaft
- Gabriele Held-Elbert
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Supervision and dial pulse detection circuit for a telephone subscr...
- Patent number 4,536,614
- Issue date Aug 20, 1985
- GTE Communication Systems Corporation
- Constantine V. Skidanenko
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Dual tone multifrequency and dial pulse receiver
- Patent number 4,460,806
- Issue date Jul 17, 1984
- AT&T Bell Laboratories
- Ronald J. Canniff
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Dial pulse delay circuit
- Patent number 4,435,620
- Issue date Mar 6, 1984
- Rockwell International Corporation
- William A. Fechalos
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Current sensing trigger for a telephone system
- Patent number 4,375,014
- Issue date Feb 22, 1983
- Great Lakes Communication Co. of Michigan
- Allen C. Horak
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Technique for measuring a duration of signaling pulses in a telepho...
- Patent number 4,300,024
- Issue date Nov 10, 1981
- Wiltron Company
- Ruben Wever
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Apparatus for pulse train measurement
- Patent number 4,255,623
- Issue date Mar 10, 1981
- San Angelo Communications & Electronics, Inc.
- Larry A. Barnes
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
DTMF and rotary dial signal receiver
- Patent number 4,145,576
- Issue date Mar 20, 1979
- Tel-Tone Corporation
- Frank Twiss
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Pulse counting circuit
- Patent number 4,087,649
- Issue date May 2, 1978
- Nippon Tsu Shin Kogyo K.K.
- Stephen E. Kerman
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Dial pulse detector
- Patent number 4,071,708
- Issue date Jan 31, 1978
- Telesciences, Inc.
- Murray L. Kaplan
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Combined rotary dial and touch-tone telephone decoding system
- Patent number 4,066,846
- Issue date Jan 3, 1978
- Melco
- Louis W. Champan
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Circuit for detecting dial pulses
- Patent number 4,055,730
- Issue date Oct 25, 1977
- Comex Systems, Inc.
- Gary N. Stapleford
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Signalling device for key telephone systems
- Patent number 4,009,354
- Issue date Feb 22, 1977
- Melco
- Louis W. Champan
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Dial pulse receiver
- Patent number 3,941,937
- Issue date Mar 2, 1976
- GTE Automatic Electric (Canada) Limited
- John A. Gauthier
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Dial pulse detection method and apparatus
- Patent number 3,935,392
- Issue date Jan 27, 1976
- Lloyd M. Smith
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
3927264
- Patent number 3,927,264
- Issue date Dec 16, 1975
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
3917913
- Patent number 3,917,913
- Issue date Nov 4, 1975
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
3892926
- Patent number 3,892,926
- Issue date Jul 1, 1975
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
3891808
- Patent number 3,891,808
- Issue date Jun 24, 1975
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
3842208
- Patent number 3,842,208
- Issue date Oct 15, 1974
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
3798379
- Patent number 3,798,379
- Issue date Mar 19, 1974
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
3727003
- Patent number 3,727,003
- Issue date Apr 10, 1973
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
3659055
- Patent number 3,659,055
- Issue date Apr 25, 1972
- G01 - MEASURING TESTING

using trains of dc pulses

Industry

Parent Industries

Current Industry

Patents Grantslast 30 patents

Telephone line monitoring apparatus and method

Telephone line monitoring apparatus and method

Device for connecting a subscriber line to a selected internal line

Rotary dial pulse receiver

Dial pulse selection

Ring detector for telephone line

Pulse detector for counting dial generated pulses

Method for determining telephone dial pulse parameters independentl...

Supervision and dial pulse detection circuit for a telephone subscr...

Dual tone multifrequency and dial pulse receiver

Dial pulse delay circuit

Current sensing trigger for a telephone system

Technique for measuring a duration of signaling pulses in a telepho...

Apparatus for pulse train measurement

DTMF and rotary dial signal receiver

Pulse counting circuit

Dial pulse detector

Combined rotary dial and touch-tone telephone decoding system

Circuit for detecting dial pulses

Signalling device for key telephone systems

Dial pulse receiver

Dial pulse detection method and apparatus

3927264

3917913

3892926

3891808

3842208

3798379

3727003

3659055

Patents Applicationslast 30 patents