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Your search returned 87 patents.
( 379/284 in Current US Classification ) |
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| Patent ID | Title | Date Filed |
| 4421955 | Distributed switching system
| August 27, 1981 |
| 4392206 | Printer
| March 24, 1980 |
| 4385206 | Programmable port sense and control signal preprocessor for a central office switching system
| December 16, 1980 |
| 4367456 | PCM and PAM Conversion circuit including signal level variation on the PCM portion of the circuit
| March 9, 1979 |
| 4347582 | Central timer unit for buffering control data in a telecommunications system
| April 23, 1980 |
| 4298775 | Microprocessor controlled telephone set
| March 14, 1979 |
| 4200772 | Computer controlled telephone answering system
| October 18, 1976 |
| 4156115 | Apparatus and method for a multiple tone code sender system for automatic call initiation
| March 30, 1978 |
| 4153817 | Digital conference circuit
| November 25, 1977 |
| 4105874 | Centrally controlled electronic telephone system having a customer memory for storing information on two or more different subscriber stations and peripheral equipment-specific information
| March 1, 1977 |
| 4076965 | Universal receiver/sender
| August 25, 1976 |
| 4032721 | Stored program logic system using a common exchange circuit
| December 29, 1975 |
| 4002851 | Telecommunication system controlled by stored program instructions
| May 19, 1975 |
| 3987252 | Computer controlled telephone answering system
| June 27, 1975 |
| 3946163 | Port multiplexer for telephone signal processing systems
| March 17, 1975 |
| 3935394 | Network routing and control arrangement
| October 4, 1974 |
| 3927273 | Junctor memory
| June 13, 1974 |
| 3922644 | Scan operation for a central processor
| September 27, 1974 |
| 3916112 | Stored program control with memory work area assignment in a communication switching system
| April 2, 1973 |
| 3912873 | Multiple fault tolerant digital switching system for an automatic telephone system
| January 17, 1974 |
| 3906163 | Peripheral control unit for a communication switching system
| September 14, 1973 |
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