| Patents for H04J 9 - Multiplex systems in which each channel is represented by a different type of modulation of the carrier (524) |
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| 04/05/2000 | CA2284174A1 Method of transmitting clock signals, method of synchronizing clock generators or network elements, as well as a network element and a clock generator |
| 03/29/2000 | EP0989706A1 Clock regeneration circuit |
| 03/29/2000 | EP0988709A2 Method and apparatus for embedding auxiliary data in a primary data signal |
| 02/03/2000 | WO1999065200A3 Procedure and device for transmitting information by radio |
| 02/02/2000 | EP0976201A1 Integrated circuit for frequency conditioning in a radio transceiver working in the uhf range, especially a wireless telephone |
| 01/11/2000 | US6014407 Method and system for simultaneously broadcasting and receiving digital and analog signals |
| 12/16/1999 | WO1999065200A2 Procedure and device for transmitting information by radio |
| 11/23/1999 | US5991334 Technique for simultaneous communications of analog frequency-modulated and digitally modulated signals using postcanceling scheme |
| 11/02/1999 | US5978123 Method for the transmission of a low-rate supplementary channel in high-rate coherent optical transmission systems |
| 09/21/1999 | US5956624 Method and system for simultaneously broadcasting and receiving digital and analog signals |
| 09/21/1999 | US5956373 AM compatible digital audio broadcasting signal transmision using digitally modulated orthogonal noise-like sequences |
| 09/07/1999 | US5949813 Method and system for simultaneously broadcasting and receiving digital and analog signals |
| 09/02/1999 | DE19805963A1 Integrierte Schaltung zur Frequenzaufbereitung eines im UHF-Bereich arbeitenden Funk-Sende-Empfängers, insbesondere eines Schnurlostelefons An integrated circuit for frequency processing of operating in the UHF range radio transceiver, in particular a cordless phone |
| 08/24/1999 | US5943345 AM multiplexing broadcast apparatus |
| 08/24/1999 | US5943148 Surveillance system of a multi-wavelength ring network |
| 08/19/1999 | WO1999041841A1 Integrated circuit for frequency conditioning in a radio transceiver working in the uhf range, especially a wireless telephone |
| 08/17/1999 | US5940365 AM data multiplexing modulation apparatus |
| 08/10/1999 | US5937000 Method and apparatus for embedding auxiliary data in a primary data signal |
| 07/21/1999 | EP0930743A1 Method of transmitting variable rate data in a communication network |
| 07/06/1999 | US5920238 Geometrically modulated waves |
| 05/18/1999 | US5905946 Of a cellular radio system |
| 05/11/1999 | US5903598 Method and system for simultaneously broadcasting and receiving digital and analog signals |
| 01/21/1999 | DE19730438A1 Method of testing of communication paths in digital communication networks |
| 12/17/1998 | WO1998057470A1 Clock regeneration circuit |
| 11/04/1998 | CN1198275A Method and apparatus for transporting auxiliary data in audio signals |
| 10/13/1998 | US5822360 Method and apparatus for transporting auxiliary data in audio signals |
| 09/30/1998 | CN1194525A Amplitude-modulation multi-way broadcasting device |
| 09/23/1998 | EP0866577A2 Band insertion and precancellation technique for simultaneous communications of analog frequency-modulated and digitally modulated signals |
| 09/03/1998 | WO1998027504A3 Method and apparatus for embedding auxiliary data in a primary data signal |
| 09/02/1998 | EP0862289A2 Method for testing the clocklines and a device for implementing this method |
| 08/27/1998 | DE19707668A1 Method of testing of communication paths in digital communication networks |
| 08/26/1998 | CA2228318A1 Method of testing clock paths and network elements for carrying out the method |
| 08/05/1998 | EP0856964A2 Optical path signal termination equipment |
| 07/08/1998 | EP0852086A1 Method and apparatus for transporting auxiliary data in audio signals |
| 07/02/1998 | WO1998028847A1 A method and a circuit for the transfer of data information |
| 06/25/1998 | WO1998027504A2 Method and apparatus for embedding auxiliary data in a primary data signal |
| 06/25/1998 | CA2273993A1 Method and apparatus for embedding auxiliary data in a primary data signal |
| 05/20/1998 | EP0843430A2 Technique for simultaneous transmission of analog frequency-modulated and digitally modulated signals using postcanceling method |
| 04/28/1998 | US5745525 Method and system for simultaneously broadcasting and receiving digital and analog signals |
| 04/08/1998 | EP0835000A1 Method for transmitting a low-rate additional channel in high-rate coherent optical transmission systems |
| 01/28/1998 | CN1171654A AM data compound modulation apparatus |
| 08/27/1997 | EP0792038A1 Monitoring system of a multi-wavelength ring network |
| 08/12/1997 | US5657154 Monitoring system for all optical regenerators |
| 04/02/1997 | EP0766422A2 Transmission by means of geometrically modulated waves |
| 03/13/1997 | WO1997009797A1 Method and apparatus for transporting auxiliary data in audio signals |
| 03/13/1997 | CA2231239A1 Method and apparatus for transporting auxiliary data in audio signals |
| 10/08/1996 | US5563556 Geometrically modulated waves |
| 08/14/1996 | CN1128922A Method and device for demodulating signal transmitted by multi carrier |
| 07/30/1996 | US5541552 Method of and apparatus for demodulating a signal conveyed by multiple carrier |
| 05/08/1996 | EP0711044A2 Channel estimation in a CDMA receiver using multiple access interference cancellation |
| 04/10/1996 | EP0706273A2 Method of and apparatus for demodulating a signal conveyed by multiple carriers |
| 01/25/1996 | WO1996002101A1 Method and system for simultaneously broadcasting and receiving digital and analog signals |
| 10/24/1995 | US5461347 Apparatus and method for geometrically modulating electromagnetic radiation and a receiver for decoding geometrically modulated signals |
| 07/26/1995 | EP0664623A2 Apparatus and method for geometrically modulating electromagnetic radiation and a receiver for decoding geometrically modulated signals |
| 07/25/1995 | CA2140402A1 Apparatus and method for geometrically modulating electromagnetic radiation and a receiver for decoding geometrically modulated signals |
| 04/25/1995 | US5410541 System for simultaneous analog and digital communications over an analog channel |
| 02/23/1995 | DE4327588A1 Method for transmitting or demodulating a digital signal and a demodulator for decoding this signal |
| 09/06/1994 | US5345439 Multi purpose digital signal regenerative processing apparatus |
| 01/05/1994 | EP0577351A2 Television signal processing apparatus |
| 11/03/1993 | EP0568291A2 Digital signal processing apparatus with three modulation (TDM,FDM,CDM)sub-systems in parallel |
| 04/14/1992 | US5105190 Electromagnetic identification system |
| 03/19/1992 | DE4029556A1 Information interchange procedure between appts. in motor vehicle - superimposing AM signal on PWM signal owing use of common circuit path |
| 01/07/1992 | US5079648 Marked recorded signals |
| 10/15/1991 | CA1290841C Electromagnetic identification system |
| 05/29/1991 | EP0259419B1 Double digital demodulator |
| 02/20/1991 | EP0151616B1 Control signalling arrangement for a digital transmission system |
| 12/19/1990 | EP0152423B1 Maintenance response signalling arrangement for a digital transmission system |
| 12/13/1989 | EP0346169A1 Method and system for the transmission of signal packets over an optical line |
| 11/02/1989 | EP0339859A1 Apparatus for monitoring the marking of recorded signals |
| 02/14/1989 | US4804924 Digital double demodulator |
| 08/02/1988 | CA1240013A1 Control signalling arrangement for a digital transmission system |
| 03/16/1988 | EP0259419A1 Double digital demodulator. |
| 02/23/1988 | CA1233233A1 Error correction scheme |
| 02/02/1988 | US4723237 Signal transmission arrangment, a transmitter and a receiver for such an arrangement and a communication system including such an arrangement |
| 01/28/1988 | DE3623783A1 Information transmission system |
| 12/29/1987 | US4716563 Demodulation of auxiliary low frequency channels in digital transmission systems |
| 12/01/1987 | CA1229889A1 Maintenance response signalling arrangement for a digital transmission system |
| 10/28/1987 | EP0242906A1 Electromagnetic identification system |
| 09/24/1987 | WO1987005758A1 Double digital demodulator |
| 07/30/1987 | EP0152423A4 Maintenance response signalling arrangement for a digital transmission system. |
| 07/23/1987 | EP0151616A4 Control signalling arrangement for a digital transmission system. |
| 06/30/1987 | US4677627 Error correction scheme |
| 06/30/1987 | US4677608 Method of transferring an additional information channel across a transmission medium |
| 04/21/1987 | US4660192 Simultaneous AM and FM transmitter and receiver |
| 04/02/1987 | DE3616864A1 Modified AM sound broadcasting system |
| 01/07/1987 | EP0207243A2 Error correction mechanism |
| 12/30/1986 | US4633464 Control signalling arrangement for a digital transmission system |
| 12/03/1986 | EP0203757A2 Digital transmission system using an auxiliary low-frequency channel |
| 11/20/1986 | EP0201971A2 Communication system |
| 04/29/1986 | US4586186 Maintenance response signalling arrangement for a digital transmission system |
| 08/28/1985 | EP0152423A1 Maintenance response signalling arrangement for a digital transmission system. |
| 08/21/1985 | EP0151616A1 Control signalling arrangement for a digital transmission system. |
| 03/27/1985 | EP0135164A1 Transmission system for higher bit rate digital signals with auxiliary signal transmission |
| 02/28/1985 | WO1985000946A1 Maintenance response signalling arrangement for a digital transmission system |
| 02/28/1985 | WO1985000945A1 Control signalling arrangement for a digital transmission system |
| 05/22/1984 | CA1167985A1 Multiplexed signal receiver |
| 04/26/1984 | WO1984001679A1 A method of transferring an additional information channel across a transmission medium |
| 10/18/1983 | US4410979 Multiplexed signal receiver |
| 09/20/1983 | CA1154096A1 Multiplex signal receiver |
| 08/31/1983 | EP0086872A2 Method and device for transmitting signals which are frequency-shift-keyed in the audible field |