| Patents for H04L 5 - Arrangements affording multiple use of the transmission path (28,368) |
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| 02/26/1980 | US4190898 Digital processor input/output apparatus for analog, digital and discrete data |
| 02/12/1980 | CA1071779A1 Multi-channel multiplex data transmission system |
| 02/05/1980 | US4187394 High-speed data link for moderate distances and noisy environments |
| 01/29/1980 | CA1070867A1 Time division digital transmission system |
| 01/08/1980 | CA1069628A1 Switching arrangement for transmitting synchronously and asynchronously occurring data |
| 12/25/1979 | US4180865 Portable multiplex bus exerciser |
| 12/11/1979 | US4178504 Balanced termination for a transmission line |
| 12/11/1979 | CA1068007A1 Automatic terminal data rate selection |
| 12/04/1979 | US4177451 Data communication system |
| 12/04/1979 | CA1067596A1 Two-wire full-duplex data transmission systems |
| 11/20/1979 | US4175214 Apparatus and method for a pulse regeneration system |
| 11/06/1979 | US4173714 Communication circuit with combined power feed and data transmission over a phantom channel |
| 10/23/1979 | US4172280 Digital output control circuit |
| 10/16/1979 | US4171467 Signal multiplexing circuit |
| 10/09/1979 | USRE30111 Digital single signal line full duplex method and apparatus |
| 10/02/1979 | CA1063744A1 Echo canceller for two-wire pull duplex data transmission |
| 09/11/1979 | CA1062374A1 System of transmitting messages between a plurality of stations |
| 09/05/1979 | EP0003849A2 Digital bus communications system |
| 09/05/1979 | EP0003848A1 Digital signal transmission system |
| 08/28/1979 | CA1061483A1 Alignment of bytes in a digital data bit stream |
| 08/22/1979 | EP0003493A1 Data transmission system between stations connected in a loop |
| 08/21/1979 | CA1060975A1 Common control signaling extraction circuit |
| 07/24/1979 | US4162378 Digital echo canceler for a modem for data transmission by means of modulation of a carrier |
| 07/24/1979 | US4162371 Method of and means for establishing two-way communication between two stations interconnected by a single signal link |
| 07/17/1979 | US4161786 Digital bus communications system |
| 07/10/1979 | US4160951 Method of regenerating asynchronous data signals and apparatus for performing the method |
| 07/10/1979 | US4160877 Multiplexing of bytes of non-uniform length with end of time slot indicator |
| 06/26/1979 | US4159448 Communication systems |
| 06/12/1979 | CA1056460A1 Bidirectional communication system for electrical power networks |
| 05/29/1979 | US4156847 Method and apparatus for confirming transmission in bidirectional CATV system |
| 05/15/1979 | US4154978 Self-contained bidirectional amplifying repeater |
| 05/15/1979 | CA1054693A1 Communication system particularly for filling stations |
| 05/01/1979 | US4152541 Full duplex driver/receiver |
| 02/13/1979 | CA1048415A1 Digital single signal line full duplex method and apparatus |
| 02/06/1979 | US4138596 Equipments for connecting PCM multiplex digital transmission systems having different nominal bit rates |
| 02/06/1979 | CA1048178A1 Digital multiplexing |
| 02/06/1979 | CA1048177A1 Multi-channel digital modulator |
| 01/30/1979 | US4137562 Data acquisition from multiple sources |
| 01/23/1979 | US4136327 Well survey system modulation technique |
| 01/16/1979 | US4135060 Circuit arrangement for a time division multiplex communication system for the channel by channel combination at the receiving end of information transmitted in the form of multiframes |
| 01/09/1979 | US4134072 Direct digital frequency synthesizer |
| 12/26/1978 | US4131767 Echo cancellation in two-wire, two-way data transmission systems |
| 12/26/1978 | US4131761 Method of and means for conveying and recovering supplementary message signals superimposed upon a multilevel signal stream in a digital transmission system |
| 11/28/1978 | CA1043464A1 Common control variable shift reframe circuit |
| 11/28/1978 | CA1043428A1 Asynchronous bit-serial data receiver |
| 10/24/1978 | US4122311 Electronic multiplexer for parallel, bi-directional scanning thermal imaging system |
| 10/24/1978 | CA1041236A1 Common control framing detector |
| 10/17/1978 | US4121217 Data transmission network interface unit |
| 10/10/1978 | US4119795 System for transmitting asynchronous bit transitions of data signals using time-division multiplexing |
| 10/10/1978 | CA1040328A1 T.d.m. transmission of asynchronously occuring binary data |
| 10/03/1978 | CA1039866A1 Semi static time division multiplex slot assignment |
| 09/26/1978 | US4117277 Arrangement for simultaneous two-way data transmission over two-wire circuits |
| 09/19/1978 | US4115849 Data interface bridge |
| 09/05/1978 | US4112253 Device for the transmission of push-pull signals across a two-wire line in full duplex operation |
| 08/29/1978 | CA1037599A1 Time-division pulse-multiplex digital electric signal switching circuit arrangement |
| 08/29/1978 | CA1037573A1 Broad band directional signal generator |
| 08/22/1978 | CA1037169A1 T.d.m. exchange systems |
| 08/15/1978 | US4107554 Data bus arrangement for Josephson tunneling device logic interconnections |
| 07/18/1978 | US4101833 Duplex data transmission modem utilizing an injected tone for shifting power within the transmit spectrum |
| 06/27/1978 | US4097694 Time-division telephone system embodying trunks having demodulating-adder circuits |
| 06/20/1978 | US4096442 Crosstalk corrector and decision device for FSK |
| 06/13/1978 | US4095045 Method and apparatus for signaling in a communication system |
| 05/02/1978 | US4087654 Echo canceller for two-wire full duplex data transmission |
| 04/25/1978 | US4086569 Communication systems |
| 04/25/1978 | US4086534 Circuit for wire transmission of high frequency data communication pulse signals |
| 04/25/1978 | US4086436 Transmit and receive digital data channel elastic store |
| 04/25/1978 | US4086428 Circuit arrangement for the automatic adjustment of a two-wire full duplex data transmission system |
| 03/28/1978 | US4081790 Code converter |
| 03/14/1978 | US4079203 Method and apparatus for transmitting auxiliary channel over digital communications system |
| 03/07/1978 | US4078153 Clock signal and auxiliary signal transmission system |
| 02/21/1978 | US4075427 System for phase division multiplex duplex communication over a two-wire circuit between a master terminal and a slave terminal |
| 02/14/1978 | US4074086 Joint adaptive echo canceller and equalizer for two-wire full-duplex data transmission |
| 02/14/1978 | US4074074 Time division digital transmission system |
| 01/24/1978 | US4070650 Digital signal transmission system and equipment |
| 01/24/1978 | US4070545 Multidirectional repeater |
| 01/17/1978 | US4069392 Dual speed full duplex data transmission |
| 01/10/1978 | US4068098 Method of and arrangement for addressing a switch memory in a transit exchange for synchronous data signals |
| 12/13/1977 | US4063041 Tdm telecommunication network |
| 12/13/1977 | US4063040 High speed multiplexer and demultiplexer for pulse code channels |
| 11/08/1977 | US4057696 Recursive-like adaptive echo canceller |
| 10/11/1977 | US4053713 Multi-channel multiplex data transmission system |
| 10/11/1977 | US4053708 Asynchronous sample pulse generator |
| 10/04/1977 | US4052556 Circuit arrangement for balancing a two wire full duplex data transmission system |
| 09/27/1977 | US4051539 Differential duration demultiplexing method and system |
| 09/20/1977 | US4049910 Digital signal transmission system |
| 09/13/1977 | US4048440 Asynchronous-to-synchronous data concentration system |
| 09/06/1977 | US4046959 Data communication system using photocouplers |
| 08/30/1977 | US4045774 Modem sharer |
| 08/09/1977 | US4041398 Bi-directional digital communication network |
| 08/02/1977 | US4040014 Modem sharing device |
| 07/26/1977 | US4038494 Digital serial transmitter/receiver module |
| 07/19/1977 | US4037050 Fault isolation in communications circuits |
| 07/12/1977 | US4035580 Switching arrangement for transmitting synchronously and asynchronously occurring data |
| 06/28/1977 | US4032714 Pcm time division multiplex communication network with digital subscriber stations |
| 06/28/1977 | US4032709 Circuit arrangement for lengthening a stop element at the receiver in a character-frame-governed time division multiplex data transmission system |
| 05/31/1977 | US4027243 Message generator for a controlled radio transmitter and receiver |
| 04/26/1977 | US4020288 System for data transmission through the channels of a frequency division multiplex system |
| 04/19/1977 | US4019176 System and method for reliable communication of stored messages among stations over a single common channel with a minimization of service message time |
| 04/12/1977 | US4017683 Digital multiplexing system employing remote scanning of a plurality of monitoring points |
| 04/05/1977 | US4016539 Asynchronous arbiter |