| Patents for H04L 1 - Arrangements for detecting or preventing errors in the information received (103,402) |
|---|
| 03/28/1978 | US4081790 Code converter |
| 03/28/1978 | US4081789 Switching arrangement for correcting the polarity of a data signal transmitted with a recurrent code |
| 03/28/1978 | US4081748 Frequency/space diversity data transmission system |
| 03/14/1978 | US4079371 Rate converter for digital signals having a negative feedback phase lock loop |
| 03/07/1978 | US4078225 Arrangement and a method for error detection in digital transmission systems |
| 02/28/1978 | US4076961 Automatic switching unit for data communications network |
| 02/14/1978 | US4074358 Test set for measuring jitter distortion of data pulses |
| 02/14/1978 | US4074230 Communication method and apparatus for providing an enhanced signal from diverse signals |
| 02/14/1978 | US4074228 Error correction of digital signals |
| 01/24/1978 | US4070648 Computer to computer communication system |
| 01/24/1978 | US4070647 Error measurement for digital systems |
| 01/24/1978 | US4070646 Pulse error detector |
| 01/24/1978 | US4070554 Digital testing and power control in a digital communication system |
| 01/10/1978 | US4068174 Digital carrier wave detect circuitry |
| 01/10/1978 | US4068172 Method of and means for measuring distortion of binary and ternary signals |
| 12/20/1977 | US4064459 Method of automatically testing the serviceability of a data transmission system |
| 12/13/1977 | US4063174 Circuit arrangement for diversity data transmission |
| 12/13/1977 | US4063038 Error coding communication terminal interface |
| 12/06/1977 | US4061997 Circuit arrangement for the reception of data |
| 11/22/1977 | US4059729 Method and system for selectively accessing multiplexed data transmission network for monitoring and testing of the network |
| 11/15/1977 | US4058672 Packet-switched data communications system |
| 11/08/1977 | US4057758 Mobile diversity radio communication system |
| 10/25/1977 | US4055832 One-error correction convolutional coding system |
| 10/25/1977 | US4055808 Data communications network testing system |
| 10/11/1977 | US4053738 Programmable data envelope detector |
| 10/11/1977 | US4053723 Method and apparatus for measuring the bit error frequency in a cable caused by crosstalk between line pairs during transmission of a 3-level coded pcm signal |
| 09/06/1977 | US4047151 Adaptive error correcting transmission system |
| 08/30/1977 | US4045771 Encoding and decoding device for error-detecting transmission systems, in particular for remote-control and remote-actuation equipments |
| 08/16/1977 | US4042783 Method and apparatus for byte and frame synchronization on a loop system coupling a CPU channel to bulk storage devices |
| 08/16/1977 | US4042780 Multiple message frame adaptor apparatus for loop communication system |
| 08/09/1977 | US4041453 Signal handling system for minimizing dropout effect |
| 08/02/1977 | US4039751 Method and apparatus for closed loop testing of first and second modulators and demodulators |
| 07/26/1977 | US4038636 Multiple decoding system |
| 07/26/1977 | US4038539 Adaptive pulse processing means and method |
| 07/19/1977 | US4037050 Fault isolation in communications circuits |
| 07/12/1977 | US4035767 Error correction code and apparatus for the correction of differentially encoded quadrature phase shift keyed data (DQPSK) |
| 07/12/1977 | US4035601 Electrical circuit arrangements responsive to serial digital signals forming multi-byte data-words |
| 07/05/1977 | US4034405 Television facsimile transmission system |
| 07/05/1977 | US4034340 System for determining the quality of transmission of incoming digital message signals |
| 07/05/1977 | US4034195 Test apparatus and method |
| 06/28/1977 | US4032886 Concatenation technique for burst-error correction and synchronization |
| 06/07/1977 | US4028536 SNAIAS digital data test set |
| 06/07/1977 | US4027952 Single optical lens with large aperture and large field |
| 05/31/1977 | US4027243 Message generator for a controlled radio transmitter and receiver |
| 05/10/1977 | USRE29215 Cross-office connecting scheme for interconnecting multiplexers and central office terminals |
| 05/10/1977 | US4022988 Fault locating apparatus for digital transmission system |
| 04/26/1977 | US4020461 Method of and apparatus for transmitting and receiving coded digital signals |
| 04/12/1977 | US4017828 Redundancy system for data communication |
| 03/29/1977 | US4015238 Metric updater for maximum likelihood decoder |
| 03/29/1977 | US4015205 Baseband signal switching arrangement for diversity reception in a PCM radio communication system |
| 03/22/1977 | US4013965 Circuit for preventing errors in decoding information from distorted pulses |
| 02/22/1977 | US4009469 Loop communications system with method and apparatus for switch to secondary loop |
| 02/08/1977 | US4007422 Method and apparatus for calling a ground station by an aircraft |
| 02/01/1977 | US4006460 Computer controlled security system |
| 02/01/1977 | US4006304 Apparatus for word synchronization in an optical communication system |
| 01/18/1977 | US4004162 Clock signal reproducing network for PCM signal reception |
| 01/11/1977 | US4003020 Digital signal transmission |
| 01/11/1977 | US4002987 Circuit arrangement for limiting the transmission speed of data signals |
| 01/04/1977 | US4001692 Time diversity data transmission apparatus |
| 01/04/1977 | US4001525 Arrangement for testing telecommunication repeaters |
| 12/07/1976 | US3996523 Data word start detector |
| 11/30/1976 | US3995225 Synchronous, non return to zero bit stream detector |
| 11/09/1976 | US3991379 Logic level decoding circuit |
| 11/02/1976 | US3990049 Selective data segment monitoring system |
| 11/02/1976 | US3990009 Method and apparatus for uniquely encoding channels in a digital transmission system |
| 10/26/1976 | US3988677 Space communication system for compressed data with a concatenated Reed-Solomon-Viterbi coding channel |
| 10/19/1976 | US3987422 System for detecting signal quality of a phase-modulated wave |
| 10/19/1976 | US3987395 Arrangement of high frequency pulse regenerative repeaters |
| 10/12/1976 | US3986168 Multichannel error signal generator |
| 10/12/1976 | US3986122 Reliable communications system |
| 09/28/1976 | US3983536 Data signal handling arrangements |
| 09/28/1976 | US3983325 Method of establishing synchronism between teletypewriter transmitter and teletypewriter receiver |
| 09/07/1976 | US3979719 Multiple block binary synchronous duplex communications system and its method of operation |
| 08/31/1976 | US3978452 System and method for concurrent and pipeline processing employing a data driven network |
| 08/31/1976 | US3978449 Method and apparatus for in-band signalling in data transmission |
| 08/31/1976 | US3978408 Circuit arrangement for selecting a diversity channel |
| 08/31/1976 | US3978406 Code error detecting system in digital code transmission |
| 08/24/1976 | US3976835 Supervisory systems for telecommunication line transmission system |
| 08/17/1976 | US3975687 Baseband signal switching arrangement for diversity reception in PCM radio communication system |
| 08/03/1976 | US3973211 Combiner-demodulator for phase shift keyed suppressed carrier signals received over two transmission paths |
| 07/20/1976 | US3970944 Pulse suppressing circuit arrangements and equipment incorporating the same |
| 07/13/1976 | US3969582 System for automatic synchronization of blocks transmitting a series of bits |
| 06/29/1976 | US3967202 Data transmission system including an RF transponder for generating a broad spectrum of intelligence bearing sidebands |
| 06/22/1976 | US3965309 Test system for a T carrier type telephone PCM communications system |
| 06/22/1976 | US3965294 Method of and apparatus for testing transmission line carrying bipolar PCM signals |
| 06/15/1976 | US3963988 Circuit arrangement for selecting a diversity channel |
| 06/08/1976 | US3962646 Squelch circuit for a digital system |
| 06/01/1976 | US3961311 Circuit arrangement for correcting slip errors in receiver of cyclic binary codes |
| 06/01/1976 | US3961203 Signal correlator |
| 05/11/1976 | US3956589 Data telecommunication system |
| 04/27/1976 | US3953798 Method and device for radio transmission of binary data signals |
| 04/20/1976 | US3952163 Method and apparatus for testing in FDM system |
| 04/13/1976 | US3950705 Noise rejection method and apparatus for digital data systems |
| 03/30/1976 | US3947769 Threshold correction system in FSK transmissions |
| 03/16/1976 | US3944975 Signal checking system |
| 03/16/1976 | US3944929 Monitor for a receiver having means for specifying regions within discrimination domains of a signal space |
| 03/09/1976 | US3943348 Apparatus for monitoring the operation of a data processing communication system |
| 03/02/1976 | US3942152 Verification arrangement |
| 02/24/1976 | US3940736 Digital code monitor system |
| 02/10/1976 | US3938085 Transmitting station and receiving station for operating with a systematic recurrent code |