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