| Patents for H04L 1 - Arrangements for detecting or preventing errors in the information received (103,402) |
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| 04/09/1991 | US5007055 Information distribution system |
| 04/09/1991 | US5007051 Link layer protocol and apparatus for data communication |
| 04/09/1991 | US5007047 Adaptive rate control for echo cancelling modem |
| 04/03/1991 | EP0420648A2 Diversity coding for transparent self-healing communications networks |
| 04/03/1991 | EP0419697A1 Method of measuring the bit error rate in the transmission of digital information |
| 03/27/1991 | EP0419432A1 A method of generating quality factors for binary digits obtained in the viterbi-analysis of a signal |
| 03/27/1991 | EP0418866A2 Signal transmission system capable of performing re-transmission control in units of slots |
| 03/27/1991 | EP0418865A2 Wireless signal transmission system with random access |
| 03/26/1991 | US5003582 Method of adjusting the end of transmission in a modem |
| 03/26/1991 | US5003540 Error correction coding and decoding circuit for digitally coded information |
| 03/26/1991 | US5003531 Survivable network using reverse protection ring |
| 03/26/1991 | CA1282148C Information transmission system |
| 03/21/1991 | WO1991003889A1 Integrated carrier detect circuit |
| 03/21/1991 | WO1991001027A3 Illegal sequence detection and protection circuit |
| 03/20/1991 | WO1991004612A1 A method of generating quality factors for binary digits obtained in the viterbi-analysis of a signal |
| 03/20/1991 | EP0418130A1 Quality monitoring equipment for digital transmission links |
| 03/20/1991 | EP0417918A2 Data receiver interface circuit |
| 03/20/1991 | EP0417739A2 Speech coding apparatus using multimode coding |
| 03/19/1991 | US5001726 Circuit for generating discrimination voltage level |
| 03/19/1991 | US5001705 Protocol control circuit for data bus system |
| 03/19/1991 | US5001571 Method and system for selecting frame size of image data in data transmission |
| 03/13/1991 | WO1991004530A1 Error detection for fiber distributed interfaced optic link |
| 03/13/1991 | EP0416943A2 Method for controlling failover between redundant network interface modules |
| 03/13/1991 | EP0416325A2 Telemetry transmitter |
| 03/13/1991 | EP0211849B1 Pager system and communication protocol |
| 03/12/1991 | US4999834 Communication method and apparatus |
| 03/12/1991 | CA1281415C Electronic cash register system |
| 03/09/1991 | WO1991003893A1 Quality control equipments for digital transmission connections |
| 03/06/1991 | EP0415897A1 A method of reducing the power requirements in a mobile radio receiver |
| 03/05/1991 | US4998251 Method of detecting erasures affecting a digital radio link and a receiver system implementing such a method |
| 03/05/1991 | CA1281079C Diversity receiver |
| 02/28/1991 | DE3928117A1 Measuring arrangement testing communication system connections - has measuring device connected to measuring interface incorporating electronic separation switches |
| 02/27/1991 | EP0414368A2 Method and apparatus for data and forward error correction coding for low DC-offset and short run length |
| 02/27/1991 | EP0216813B1 Data transmission |
| 02/27/1991 | EP0134817B1 Method of transferring digital signal |
| 02/27/1991 | CN1049580A Data and forward error control coding techniques for digital signals |
| 02/20/1991 | EP0413369A1 A portable pager |
| 02/20/1991 | EP0151616B1 Control signalling arrangement for a digital transmission system |
| 02/19/1991 | CA1280468C Radio data transmission system |
| 02/13/1991 | EP0412574A2 Antenna for watch pager system |
| 02/13/1991 | EP0412320A1 Method of data transmission by means of impulse telegrams between telecontrol equipment subscriber stations, and device for carrying out the method |
| 02/13/1991 | EP0412085A1 Network interface. |
| 02/12/1991 | US4993045 Modem diagnostic loop |
| 02/12/1991 | US4992973 Data transmission apparatus with loopback topology |
| 02/06/1991 | EP0411677A2 Dispatch trunked radio system |
| 02/06/1991 | EP0411538A2 Satellite communications system operating in asynchronous mode for central-to-terminal station transmission |
| 02/06/1991 | EP0411526A1 Device for the correction of transmission distorsions of a data signal according to transmission code violations |
| 02/06/1991 | EP0411188A1 Method for supervising the operational state of an electro-optical transmission device, and circuitry for carrying out the method |
| 02/06/1991 | EP0411110A1 Very high speed error detection network |
| 02/05/1991 | US4991184 Data communication system having a speed setting variable with transmission quality factors |
| 02/05/1991 | US4989949 Arrangement for discriminating whether or not semiconductor laser is functional |
| 02/04/1991 | CA2022424A1 Method and circuit arrangement for monitoring the operating condition of an electro-optical transmission system |
| 01/31/1991 | DE3924635A1 Duplex digital data and simultaneous alarm signal transmission - using half of channel bandwidth for data traffic and remainder for alarm transmission in fail-back mode |
| 01/30/1991 | EP0410270A2 Method for operating a secure signal transmission interface |
| 01/30/1991 | CN1011461B Ensemble modem structure for imperfect transmission media |
| 01/29/1991 | US4989202 ISDN testing device and method |
| 01/29/1991 | CA1279710C Monitoring device for monitoring the operating states of telecommunications transmission devices |
| 01/24/1991 | WO1991001027A2 Illegal sequence detection and protection circuit |
| 01/23/1991 | EP0409641A2 Multipoint connected communication system having function of retraining modems provided therein and method of retraining the modems |
| 01/23/1991 | EP0409578A1 Data communication method and system with cyclic sequence of acknowledgements |
| 01/23/1991 | EP0409171A2 Diversity receiving system for use in digital radio communication with means for selecting branch by estimating propagation path property |
| 01/23/1991 | CN1048776A Ensemble modem structure for imperfect transmission media |
| 01/23/1991 | CN1048775A Ensemble modem structure for imperfect transmission media |
| 01/23/1991 | CN1048774A Ensemble modem structure for imperfect transmission media |
| 01/18/1991 | CA2021072A1 Data and forward error control coding techniques for digital signals |
| 01/17/1991 | DE3922384A1 Process for automatic change of radio transmission channel - allows participants to switch channels if interference continues to effect transmission |
| 01/16/1991 | EP0408086A2 Watch pager system |
| 01/15/1991 | US4985904 High speed switching system in a radio-communication system including a plurality of main communication systems and a plurality of stand-by communication systems |
| 01/15/1991 | US4985901 Method and device for evaluating the safety margin of a digital video signal |
| 01/15/1991 | US4985900 Non-intrusive channel-impairment analyzer |
| 01/09/1991 | EP0407101A2 Error detection and correction system for long burst errors |
| 01/09/1991 | EP0406741A2 Quasi-synchronous decision method for channel changing |
| 01/09/1991 | CN1048472A Mobile assisted handoff |
| 01/08/1991 | US4984252 Channel switching system |
| 01/08/1991 | CA1278873C Runt packet filter |
| 01/08/1991 | CA1278828C Radio transmission system having simplified error coding circuitry and fast channel switching |
| 01/03/1991 | DE3921229A1 Operation monitoring system for digital transmission link - checks received monitoring signal telegram each intermediate station |
| 01/02/1991 | EP0406193A2 A method for synchronizing a mobile unit and a base station |
| 01/02/1991 | EP0406186A2 Mobile assisted handoff |
| 01/02/1991 | EP0405804A1 Erasure arrangement for an error correction decoder |
| 01/02/1991 | EP0405662A2 Receiver for data transmission system with nonlinearities |
| 01/02/1991 | EP0405384A2 Apparatus for estimating communication link quality |
| 01/02/1991 | EP0405355A1 Device for detecting a signalling constituted of a continuous train of same value binary elements |
| 01/02/1991 | EP0405074A2 Hand-held bar code scanner |
| 01/02/1991 | EP0405041A1 Terminal adapter having a multiple HDLC communication channels receiver for processing control network management frames |
| 01/02/1991 | EP0224586B1 Digital communication equipment |
| 01/02/1991 | CA1278626C Asynchronous communications system |
| 12/28/1990 | CA2016847A1 Error detection and correction systems for long burst errors |
| 12/27/1990 | WO1991000658A1 Method for synchronization in a cellular mobile radio system |
| 12/27/1990 | WO1991000657A1 Mobile assisted handoff |
| 12/27/1990 | WO1990016033A1 Hand-held data capture system with interchangeable modules |
| 12/27/1990 | EP0404173A2 Multiple access satellite communication system for mini-earth station networks |
| 12/26/1990 | CN1011023B 信息传输系统 Information transmission system |
| 12/26/1990 | CA2013484A1 Erasure arrangement for an error correction decoder |
| 12/25/1990 | US4980924 HF radio communication systems with frequency management |
| 12/19/1990 | EP0403147A2 Line interface circuit and a method of testing such a circuit |
| 12/19/1990 | EP0402954A2 Prioritizized image transmission system and method |
| 12/19/1990 | EP0152423B1 Maintenance response signalling arrangement for a digital transmission system |
| 12/18/1990 | US4979174 Error correction and detection apparatus and method |
| 12/18/1990 | CA1278059C2 Multipurpose digital integrated circuit for communication and control network |