| Patents for H04J 3 - Time-division multiplex systems (63,408) |
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| 06/13/1978 | US4095048 Method of synchronizing a pulse code modulation (pcm) junction and an arrangement for applying this method |
| 06/06/1978 | US4093827 Symmetrical time division matrix and a network equipped with this kind of matrix |
| 06/06/1978 | US4093823 Statistical multiplexing system for computer communications |
| 05/16/1978 | US4090035 Line access module |
| 05/09/1978 | US4088831 Synchronization for PCM transmission systems |
| 05/02/1978 | US4087642 Digital data communication system |
| 04/25/1978 | US4086569 Communication systems |
| 04/25/1978 | US4086537 Time division multiplex communication receiving apparatus |
| 04/25/1978 | US4086437 Resynchronizing circuit for TDM system |
| 04/25/1978 | US4086436 Transmit and receive digital data channel elastic store |
| 04/04/1978 | US4082922 Statistical multiplexing system for computer communications |
| 03/14/1978 | US4079371 Rate converter for digital signals having a negative feedback phase lock loop |
| 03/07/1978 | US4078156 Drift cancellation circuit for multiplexer amplifier |
| 02/28/1978 | US4077004 Fault location system for a repeatered PCM transmission system |
| 02/28/1978 | US4076964 Time division system for synchronizing functions controlled by different clocks |
| 02/21/1978 | US4075432 Telephone concentrator |
| 02/21/1978 | US4075428 Device for providing phase synchronism of a transit station in a digital telecommunication network |
| 02/14/1978 | US4074127 Optical PCM group transmission repeating system |
| 02/14/1978 | US4074080 Method and switching arrangement for synchronizing oscillators of a digital telecommunication network |
| 02/14/1978 | US4074072 Multiprocessor control of a partitioned switching network by control communication through the network |
| 02/07/1978 | US4072923 Multichannel seismic telemeter system and array former |
| 02/07/1978 | US4072826 Pulse stuffing demand generating device |
| 01/31/1978 | US4071826 Clipped speech channel coded communication system |
| 01/31/1978 | US4071706 Data packets distribution loop |
| 01/31/1978 | US4071705 Quantized non-synchronous clipped speech multi-channel coded communication system |
| 01/31/1978 | US4071700 Testing apparatus |
| 01/24/1978 | US4070650 Digital signal transmission system and equipment |
| 01/24/1978 | US4070551 Local call completion for time division multiplexing system |
| 01/24/1978 | US4070550 Quantized pulse modulated nonsynchronous clipped speech multi-channel coded communication system |
| 01/17/1978 | US4069504 Digital transmission method for coded video signals |
| 01/03/1978 | US4066844 Adaptable zero order predictor for speech predictive encoding communications systems |
| 01/03/1978 | CA1023812A1 Apparatus for automatic retrieval of characteristic elements of a time division multiplexed binary raster |
| 12/20/1977 | US4064378 Echo cancelling system for multiplex telephone circuits |
| 12/13/1977 | US4063040 High speed multiplexer and demultiplexer for pulse code channels |
| 11/29/1977 | US4060797 Serial digital bit stream code detector |
| 11/22/1977 | US4059731 Signaling storage in digital channel banks |
| 11/22/1977 | US4059730 Apparatus for mitigating signal distortion and noise signal contrast in a communications system |
| 11/22/1977 | US4059729 Method and system for selectively accessing multiplexed data transmission network for monitoring and testing of the network |
| 11/15/1977 | US4058830 One way data transmission system |
| 11/15/1977 | US4058683 Expandable memory for asynchronous PCM multiplexer |
| 11/15/1977 | US4058682 Expandable memory for PCM signal transmission |
| 11/08/1977 | US4057695 Telecommunication system with controlled gain active filters |
| 11/08/1977 | US4057690 Method and apparatus for detecting the presence of a speech signal on a voice channel signal |
| 11/01/1977 | US4056851 Elastic buffer for serial data |
| 11/01/1977 | US4056686 Multiplexed signal reference level equalizer |
| 10/18/1977 | US4054754 Arrangement for transmitting digital data and synchronizing information |
| 10/18/1977 | US4054747 Data buffer |
| 10/11/1977 | US4053715 Stuffing channel unit for telephone pcm system |
| 10/04/1977 | US4052567 Multiplexer receiver terminator |
| 10/04/1977 | US4052566 Multiplexer transmitter terminator |
| 10/04/1977 | US4052563 Multiplex speech transmission system with speech analysis-synthesis |
| 09/27/1977 | US4051328 Method for operating a digital time division multiplex communication network |
| 09/20/1977 | US4049917 PCM telecommunication system with merger of two bit streams along a common signal path |
| 09/20/1977 | US4049910 Digital signal transmission system |
| 09/13/1977 | US4048447 PCM-TASI signal transmission system |
| 09/06/1977 | US4047221 Interframe coding apparatus |
| 09/06/1977 | US4046963 Times slot switching |
| 08/30/1977 | US4045618 Device for synchronizing a binary data train in relation to a reference train |
| 08/16/1977 | US4042781 Apparatus for synchronizing oscillators in the network nodes of a digital telecommunications network |
| 08/09/1977 | US4041392 System for simultaneous transmission of several pulse trains |
| 08/02/1977 | US4039948 Multi-channel differential pulse code modulation system |
| 07/12/1977 | US4035772 Utility meter reading system |
| 07/12/1977 | US4035584 Space division network for time-division switching systems |
| 07/05/1977 | US4034294 Decoder with reaction time compensation |
| 06/28/1977 | US4032720 Integrated demultiplexing circuit with continuously variable outputs |
| 06/28/1977 | US4032719 Modular slot interchange digital exchange |
| 06/28/1977 | US4032718 Four-wire integrable hybrid |
| 06/21/1977 | US4031506 Multiplexer commutated high pass filter |
| 06/21/1977 | US4031504 Gain ranging amplifier system |
| 06/21/1977 | US4031316 Apparatus for the time division multiplex transmission of binary signals |
| 06/07/1977 | US4028497 Acquisition technique for time division multiple access communication system |
| 06/07/1977 | US4028496 Digital speech detector |
| 06/07/1977 | US4028495 Time division communication system adapted to structural expansion |
| 05/31/1977 | US4027263 Frequency generator |
| 05/24/1977 | US4025720 Digital bit rate converter |
| 05/17/1977 | US4024349 Quasi-resonant transfer conferencing circuit |
| 05/10/1977 | USRE29215 Cross-office connecting scheme for interconnecting multiplexers and central office terminals |
| 05/03/1977 | US4021609 System for regenerating a data from a burst signal which is received and processing said data with a local clock and the circuit for carrying out the same |
| 04/19/1977 | US4019143 Standby apparatus for clock signal generators |
| 04/19/1977 | US4019138 Frequency synchronizing system for satellite communication |
| 04/12/1977 | US4017799 High speed multiplex data transmission system |
| 04/12/1977 | US4017688 Method and devices for inserting additional pattern in, or removing same from, a message |
| 04/12/1977 | US4017687 Device for minimizing interchannel crosstalk in high rate commutator multiplexers |
| 04/12/1977 | US4017684 System for determining burst sending timing in TDMA communication |
| 04/05/1977 | US4016368 Framing circuit for digital receiver |
| 03/15/1977 | US4012597 Transmission trunk multichannel dispatch system with priority queuing |
| 03/15/1977 | US4012595 System for transmitting a coded voice signal |
| 03/08/1977 | US4011412 Method of operating a PCM time-division multiplex telecommunication network |
| 03/01/1977 | US4010385 Multiplexing circuitry for time sharing a common conductor |
| 03/01/1977 | US4010325 Framing circuit for digital signals using evenly spaced alternating framing bits |
| 02/22/1977 | US4009347 Modular branch exchange and nodal access units for multiple access systems |
| 02/22/1977 | US4009346 Distributional activity compression |
| 02/22/1977 | US4009345 External management of satellite linked exchange network |
| 02/22/1977 | US4009344 Inter-related switching, activity compression and demand assignment |
| 02/22/1977 | US4009343 Switching and activity compression between telephone lines and digital communication channels |
| 02/15/1977 | US4008375 Digital voice switch for single or multiple channel applications |
| 02/01/1977 | US4006314 Digital interface for resynchronizing digital signals |
| 02/01/1977 | US4006302 Switching arrangement for extending the receiver stop pulse length in time division multiplex transmission |
| 01/25/1977 | US4005276 Digital voice signaling with digital echo detection and voice activity compression used to cancel echo |
| 01/25/1977 | US4005274 Pulse-code modulation communication system |