H04Q 1/36

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Patent/Pub #TitleFiling DateIssue/Publication DatePatent Owner
6788272 Feed networkSep 23, 02Sep 07, 04MAXRAD, INC.
4933672 Data transmission system with a digital alarm facilityAug 22, 88Jun 12, 90INTERNATIONAL BUSINESS MACHINES CORPORATION
4839920 Method for determining telephone dial pulse parameters independently of subscriber line lengthAug 25, 86Jun 13, 89SIEMENS AKTIENGESELLSCHAFT
4590432 Constant-percent break pulse correctorMay 21, 84May 20, 86AT&T Bell Laboratories, BELL TELEPHONE LABORATORIES, INCORPORATED,
4555593 Electronic telephone relayFeb 16, 83Nov 26, 85MICRO COMMUNICATIONS, INC.
4555702 Remote control signal reproducing circuitSep 15, 82Nov 26, 85HITACHI, LTD.
4375014 Current sensing trigger for a telephone systemFeb 17, 81Feb 22, 83GREAT LAKES COMMUNICATION CO., Great Lakes Communication Co. of Michigan,
4374305 Arrangement for regenerating start-stop signals and dial pulsesSep 26, 80Feb 15, 83U.S. PHILIPS CORPORATION
4326105 Dial pulse detectorFeb 08, 80Apr 20, 82CANADIAN IMPERIAL BANK OF COMMERCE, MITEL CORPORATION,
4319091 Dial pulse restorerOct 15, 79Mar 09, 82BANKERS TRUST COMPANY
4293739 Circuit with crosstalk elimination capabilityJan 29, 80Oct 06, 81Nippon Electric Co., Ltd.
4278842 Circuit for eliminating spurious pulses in a dial pulse streamJun 06, 79Jul 14, 81BELL TELEPHONE LABORATORIES, INCORPORATED
4230912 Dial pulse sensor and repeater circuitFeb 21, 79Oct 28, 80AG COMMUNICATION SYSTEMS CORPORATION, 2500 W. UTOPIA RD., PHOENIX, AZ 85027, A DE CORP., GTE AUTOMATIC ELECTRIC LABORATORIES INCORPORATED,
4227054 Digital constant-percent break pulse correctorDec 01, 78Oct 07, 80BELL TELEPHONE LABORATORIES, INCORPORATED
4223184 Minimum break/make pulse correctorOct 24, 78Sep 16, 80BELL TELEPHONE LABORATORIES, INCORPORATED
4207436 Constant percent break type dial pulse correctorJul 26, 78Jun 10, 80AG COMMUNICATION SYSTEMS CORPORATION, 2500 W. UTOPIA RD., PHOENIX, AZ 85027, A DE CORP., GTE AUTOMATIC ELECTRIC LABORATORIES INCORPORATED,