| Patents for H04B 3 - Line transmission systems (31,523) |
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| 01/27/1987 | US4639714 Combined power and control signal transmission system |
| 01/27/1987 | US4639557 Remote testing system for electrical circuits |
| 01/27/1987 | CA1217288A1 Digital voice transmission having improved echo suppression |
| 01/27/1987 | CA1217286A1 Maintenance termination unit |
| 01/21/1987 | EP0208834A2 Wired network for broad-band communication |
| 01/20/1987 | US4638495 Automatic adaptive equalizer |
| 01/20/1987 | US4638299 Electrical appliance control |
| 01/20/1987 | US4638298 Communication system having message repeating terminals |
| 01/15/1987 | WO1987000368A1 Cable car with data transmission by cable |
| 01/13/1987 | US4637064 Local area network equalization system and method |
| 01/13/1987 | US4636771 Power line communications terminal and interface circuit associated therewith |
| 01/13/1987 | US4636586 Speakerphone with adaptive cancellation of room echoes |
| 01/13/1987 | CA1216689A1 Power line telephone extension system having transmitting coded signals between phones in the system, full duplex conferencing, call hold, multi- telephone extensions and intercom |
| 01/07/1987 | EP0207348A1 Two-wire amplifier, two-wire-four-wire amplifier or four-wire circuit with amplification |
| 01/07/1987 | CN86203111U Carrier wave telephone for railway coach |
| 01/06/1987 | US4635276 Asynchronous and non-data decision directed equalizer adjustment |
| 01/06/1987 | US4635252 Conference circuit for digital communication systems |
| 01/06/1987 | US4634990 Apparatus for demodulating differential phase shift keyed signals |
| 01/06/1987 | CA1216356A1 Filter for subscriber control system |
| 12/31/1986 | CN85103998A High-speed digital loop transceiver |
| 12/30/1986 | US4633482 Method of and arrangement for determining the optimum position of the reference tap of an adaptive equalizer |
| 12/30/1986 | US4633464 Control signalling arrangement for a digital transmission system |
| 12/30/1986 | US4633218 Apparatus for receiving low level digital signals transmitted over power lines |
| 12/30/1986 | US4633200 Voltage controlled equalizer |
| 12/30/1986 | US4633046 Adaptive echo canceller |
| 12/30/1986 | EP0206161A2 Automatic telephone line fault locator |
| 12/30/1986 | EP0205563A1 System for selectively coupling a plurality of data stations into a single communications path. |
| 12/30/1986 | CA1216085A1 Elevator control |
| 12/24/1986 | CN85104635A Local area network |
| 12/23/1986 | US4631734 Cross-polarization canceler/equalizer |
| 12/23/1986 | US4631488 QAM demodulator with distortion compensation |
| 12/23/1986 | US4631475 Method of detecting hazardous line voltages over a two-wire line |
| 12/17/1986 | EP0205373A1 Adjustable digital phase shifter and digital velocity compensator for a magnetoscope using it |
| 12/17/1986 | EP0205182A1 Adjustable lossy delay equalizer having at least one fixed delay point |
| 12/16/1986 | US4630284 Low power line driving digital transmission system |
| 12/16/1986 | US4630228 Transmission line analyzer for automatically identifying the severities and locations of multiple mismatches |
| 12/16/1986 | US4629905 Circuit arrangement comprising two feed circuits connectable to a load having mutually opposite poling |
| 12/16/1986 | US4629836 Method and apparatus for accessing communication systems |
| 12/16/1986 | US4629829 Full duplex speakerphone for radio and landline telephones |
| 12/16/1986 | US4629828 Signal transmission apparatus for steering operation board |
| 12/16/1986 | CA1215487A1 Digital voice transmission having improved echo suppression |
| 12/10/1986 | EP0204308A2 Modem communication system having training means and method for training same |
| 12/09/1986 | US4628157 Bidirectional adaptive voice frequency repeater |
| 12/09/1986 | US4628156 For a multiple voice link speech coder communication system |
| 12/09/1986 | CA1215136A1 Optical receiver circuit |
| 12/09/1986 | CA1215134A1 Process for restoring to shape a deformed numerical signal and device for putting the process into effect |
| 12/04/1986 | WO1986007223A1 Ensemble modem structure for imperfect transmission media |
| 12/03/1986 | EP0203726A1 Non linear adaptive filters |
| 12/02/1986 | US4627076 Low power digital bus |
| 12/02/1986 | US4627072 Equalizer modifying a phase of a gain control signal to carry out equalization |
| 12/02/1986 | CA1214861A1 Component video interconnection apparatus |
| 12/02/1986 | CA1214834A1 Demodulator with agc circuit for multi-level quadrature amplitude-modulated carrier wave |
| 12/02/1986 | CA1214832A1 Single frequency detector |
| 11/26/1986 | EP0202687A2 Noise-free terminal station compatible with existing master stations |
| 11/26/1986 | EP0202596A2 Improvements to the systems for bidirectional digital transmission with echo-cancellation |
| 11/26/1986 | CN86103406A Ensemble modem structure for imperfect transmission media |
| 11/25/1986 | US4625241 Timing control signal generator for teletext signal waveform equalizer |
| 11/20/1986 | EP0201758A2 Digital demodulator for frequency-modulated signals |
| 11/19/1986 | CN85109020A Full duplex speakerphone for radio and landline telephones |
| 11/18/1986 | US4623998 Communication network having gain adjustment function of a transmission amplifier of medium attachment unit |
| 11/18/1986 | US4623980 Method of processing electrical signals by means of Fourier transformations |
| 11/18/1986 | US4623884 Transmission line control system with by-pass control |
| 11/18/1986 | CA1214224A1 Method of and arrangement for determining the optimum position of the reference tap of an adaptive equalizer |
| 11/12/1986 | EP0201281A2 Adaptive equalizer |
| 11/11/1986 | US4622535 Receiving circuit for a data transmission system |
| 11/06/1986 | WO1986006567A1 Method and apparatus for adjusting a digital equalizing filter in simultaneous adaptive echo elimination and adaptive elimination of noise caused by intersymbol interference |
| 11/05/1986 | EP0200016A2 Information transmission method using electrical power distribution networks |
| 11/05/1986 | EP0199879A1 A process and system for improving echo cancellation within a transmission network |
| 11/05/1986 | EP0199807A1 Process for reducing the loading of a transmission circuit by the receiving circuit of several transmission/receiving sets, and a circuit arrangement for realisation of the process |
| 11/05/1986 | EP0199727A1 Method to test the function of an adaptive echo canceller. |
| 11/04/1986 | US4621367 Signal level compensation in an in-line data communication system |
| 11/04/1986 | US4621356 Communications interface for duplex transmission and reception of data and other signals over telephone lines |
| 11/04/1986 | US4621173 Method of reducing the convergence time of an echo canceller and apparatus for carrying out said method |
| 11/04/1986 | US4621172 Fast convergence method and system for echo canceller |
| 11/04/1986 | US4621170 Means of transmitting signals along a line while also providing a direct voltage source |
| 11/04/1986 | CA1213646A1 Microwave reception chain comprising a device for direct microwave demodulation |
| 10/29/1986 | EP0199148A2 Mains-linked multiple-access apparatus |
| 10/23/1986 | WO1986006230A1 Apparatus for analysing two-channel transmission/reflection characteristics |
| 10/22/1986 | EP0198553A1 System for asymmetrical signal transmission |
| 10/22/1986 | EP0073776B1 Electric signalling installation comprising at least one transmitter and one receiver |
| 10/21/1986 | CA1213088A1 Echo canceller dynamic range extension |
| 10/21/1986 | CA1213014A1 Data transmission system |
| 10/21/1986 | CA1213008A1 Automatically adjustable equalizing network |
| 10/14/1986 | US4617656 Information transmission system with modems coupled to a common communication medium |
| 10/08/1986 | EP0134229B1 Borsht/slic auto balancing technique |
| 10/08/1986 | CN85100755A Two-way carrier communication system via the power distribution zero order network |
| 10/07/1986 | CA1212417A1 Piezo-electric terminal station for communications system |
| 10/01/1986 | EP0128942B1 Method of detecting hazardous line voltages over a two-wire line |
| 09/30/1986 | US4615037 Phase scatter detection and reduction circuit and method |
| 09/30/1986 | US4615025 Data transmission system |
| 09/24/1986 | EP0195626A2 Data communications system |
| 09/24/1986 | EP0195100A1 Method and apparatus for data transmission between a transmission arranged in a borehole and a surface-mounted transceiver |
| 09/23/1986 | US4613731 In a data communication system |
| 09/23/1986 | CA1211812A1 Distortion compensation apparatus and method |
| 09/23/1986 | CA1211799A1 Apparatus for correcting frequency-dependent attenuation of the transmitting medium in signal transmission |
| 09/17/1986 | EP0194902A1 Method and system for spread spectrum transmission, especially for information transmission in an electric power distribution network |
| 09/17/1986 | EP0194785A2 Packet switching system |
| 09/17/1986 | EP0194738A1 Multi-stage echo canceller |
| 09/17/1986 | EP0104220B1 Supply circuit included in a dc-magnetized hybrid transformer |
| 09/16/1986 | CA1211527A1 Electric utility communication system with field installation terminal and load management terminal with remotely assignable unique address |