| Patents for H04Q 1 - Details of selecting apparatus or arrangements (11,745) |
|---|
| 03/09/1983 | EP0073720A1 Device for digital frequency generation |
| 03/09/1983 | EP0073719A1 Digital frequency detecting device |
| 03/01/1983 | CA1142280A1 Detector for multifrequency signals |
| 02/22/1983 | US4375102 Digital code word detection |
| 02/22/1983 | US4375014 Current sensing trigger for a telephone system |
| 02/17/1983 | WO1983000588A1 Multi-tone signal generator |
| 02/09/1983 | EP0071264A2 Connection strip for telephone exchanges |
| 02/01/1983 | US4371757 Enclosure for outdoor cross-connect system for telecommunications |
| 02/01/1983 | US4371083 Universal rack for housing telecommunication equipment |
| 02/01/1983 | CA1140688A1 Telephone summing circuit |
| 01/25/1983 | CA1140284A1 Dial pulse detection circuit |
| 01/25/1983 | CA1140244A1 Apparatus for interconnection of a multi- channel communication network |
| 01/11/1983 | CA1139414A1 Terminal apparatus for telecommunications lines |
| 01/04/1983 | CA1139010A1 Telephone line cutover apparatus and switch |
| 12/28/1982 | US4366566 System for interconnecting subscribers lines to an automatic digital telephone switching system |
| 12/28/1982 | US4366348 Method and apparatus for decoding and processing the informational content of multi-frequency signals |
| 12/23/1982 | WO1982004488A1 Adaptive techniques for automatic frequency determination and measurement |
| 12/21/1982 | CA1138078A1 Printer control system |
| 12/14/1982 | CA1137565A1 Digital multi-frequency receiver |
| 12/07/1982 | US4363100 Detection of tones in sampled signals |
| 12/01/1982 | EP0065598A1 Improvements in telecommunication receivers |
| 11/30/1982 | US4361875 Multiple tone detector and locator |
| 11/30/1982 | CA1136783A1 Telephone circuit |
| 11/23/1982 | US4360710 Telephone circuit |
| 11/16/1982 | CA1135886A1 Dial pulse sensor and repeater circuit |
| 10/20/1982 | EP0062771A1 Connexion of conductors for a telecommunication cable |
| 10/19/1982 | US4355405 Digital signalling system |
| 10/19/1982 | CA1134079A1 Methods and apparatus for digitally signaling sounds and tones in a pcm multiplex system |
| 10/12/1982 | US4354248 Programmable multifrequency tone receiver |
| 10/12/1982 | CA1133620A1 Pbx field display |
| 10/06/1982 | EP0061462A1 Multi-system portable paging device. |
| 09/28/1982 | US4352146 Rack structure for electrical communications equipment |
| 09/14/1982 | CA1131818A1 Current limited subscriber line feed circuit |
| 08/31/1982 | US4347408 Multi-frequency signal receiver |
| 08/31/1982 | US4347406 Pulse detector circuit |
| 07/27/1982 | CA1128614A1 Multi-frequency signal receiving apparatus |
| 07/20/1982 | CA1128223A1 Telephone supervision system using dtmf signals |
| 07/07/1982 | EP0055343A1 Distributor for a small telephone exchange |
| 07/06/1982 | CA1127280A1 Identification device and method for multifrequency signal digital receiver |
| 06/29/1982 | CA1126865A1 Programmable digital tone detector |
| 06/23/1982 | EP0054341A2 Telephone distribution frame connector assembly |
| 06/22/1982 | US4336467 Voltage detector |
| 06/22/1982 | US4336424 Circuit arrangement for monitoring operating conditions of direct current devices |
| 06/15/1982 | CA1125870A1 Tone signal detectors |
| 06/08/1982 | US4334273 Signal processing system using a digital technique |
| 06/08/1982 | CA1125393A1 Digital signal detector |
| 06/01/1982 | CA1124898A1 Pcm tone signal generator |
| 06/01/1982 | CA1124824A1 Frame to distributor coupling devices in telecommunication exchanges |
| 05/25/1982 | US4331956 Control means for a solid state crossbar switch |
| 05/25/1982 | US4331839 Telephone distribution frame connector assembly |
| 05/18/1982 | US4330780 Radio paging receiver having pre-recorded voice messages which are selected by address codes and read out responsive to a suffix code |
| 05/12/1982 | EP0051494A1 Automatic maintenance and self-test system for a digital multiplexed telecommunication system |
| 05/04/1982 | US4328524 Cable head with protection for a telephone exchange distributor |
| 05/04/1982 | US4328398 Digital multi-frequency receiver |
| 04/27/1982 | US4327253 Circuit arrangement for consecutively monitoring operating conditions of direct current devices |
| 04/20/1982 | US4326256 Frequency discriminating circuit |
| 04/20/1982 | US4326107 Communication system and means for interconnection of same |
| 04/20/1982 | US4326105 Dial pulse detector |
| 04/15/1982 | WO1982001268A1 Multi-system portable paging device having a microprocessor for providing in real time multiple scheme decoding and energy-saving routines |
| 04/13/1982 | CA1121926A2 Pulse width modulating signal generator and method |
| 04/07/1982 | EP0012762B1 Signal translator with squelch |
| 04/06/1982 | US4323881 Radio pager with reduced power consumption |
| 03/31/1982 | EP0048566A1 Telephone circuit |
| 03/30/1982 | US4322686 Frequency comparator circuit |
| 03/30/1982 | CA1121041A1 Connector assembly for telephone distribution equipment |
| 03/23/1982 | CA1120622A1 Single frequency tone receiver |
| 03/16/1982 | US4320261 Cable routing methods and apparatus |
| 03/16/1982 | CA1120109A1 Minimum break/make pulse corrector |
| 03/16/1982 | CA1120104A1 Digital spectrum analysers |
| 03/09/1982 | US4319334 Frequency sensing device for reducing non-periodic components |
| 03/09/1982 | US4319092 Current detection circuit arrangement for an automatic telephone exchange |
| 03/09/1982 | US4319091 Dial pulse restorer |
| 02/23/1982 | CA1118879A1 Modular termination system for communication lines |
| 02/16/1982 | CA1118521A1 System for interconnection of multiple insulated wires |
| 02/09/1982 | CA1118125A1 Constant percent break type dial pulse corrector |
| 02/03/1982 | EP0044913A1 Pluggable device for testing one cable conductor with respect to all the other conductors within a contact element |
| 02/02/1982 | US4314304 Line protector for a communications circuit |
| 02/02/1982 | CA1117636A1 Telephone exchange |
| 01/27/1982 | EP0044387A1 Universal plug housing for a non solder, non screw and non strip system for testing, connecting and disconnecting conductor cords |
| 01/26/1982 | US4313147 Protective device for communication system |
| 01/26/1982 | US4313107 Tone signal detectors |
| 01/26/1982 | US4313039 Telephone modular distributing frame |
| 01/26/1982 | US4313038 DTMF Signal receiver |
| 01/26/1982 | EP0035564A4 Binary coincidence detector. |
| 01/19/1982 | US4311878 Dialing interval transmission gating arrangement |
| 01/06/1982 | EP0043320A1 Digital frequency receiver |
| 01/05/1982 | US4309766 Arrangement for subscriber circuits utilizing digital time division multiplex telecommunication installations and particularly for PCM local exchanges |
| 01/05/1982 | US4309736 Protective device for low-voltage lines |
| 12/23/1981 | EP0042314A1 Distributor, especially for a telephone exchange |
| 12/16/1981 | EP0041595A1 Terminal unit for PCM cable |
| 12/08/1981 | US4304966 PBX Field display |
| 12/01/1981 | US4303296 Modular interface connector |
| 11/17/1981 | US4301334 Telecommunication subscriber line access circuit with ground key and insulation fault indication |
| 11/10/1981 | US4300024 Technique for measuring a duration of signaling pulses in a telephone circuit |
| 11/10/1981 | CA1112384A1 Loop to ground start circuit |
| 11/10/1981 | CA1112381A1 Tone decoding circuit |
| 10/27/1981 | CA1111588A1 Frequency recognizing device for pcm telephone systems |
| 10/27/1981 | CA1111585A1 Ac supervisory signal detector circuit |
| 10/27/1981 | CA1111582A1 Signal processor for use with a telephone system and a digital transmission system |
| 10/27/1981 | CA1111531A1 Digital signalling receiver for receiving pcm tones |