| Patents for H04J 7 - Multiplex systems in which the amplitudes or durations of the signals in individual channels are characteristic of those channels (369) |
|---|
| 04/25/1990 | EP0365431A1 Transmitter, transmission method and receiver |
| 04/25/1990 | EP0165242B1 Fiber optic digital data transmitting system |
| 12/28/1989 | WO1989012935A1 An arrangement for wireless transmission of signals via a serial two-conductor data bus |
| 11/02/1989 | EP0339641A1 Method and device for adding and separating a low rate digital channel to the high rate channel of a transmission link |
| 08/29/1989 | US4862455 Demultiplexing circuit for a multiplex signal |
| 05/31/1989 | EP0317654A1 Demultiplexing circuit |
| 05/16/1989 | US4831662 Fiber optic data transmitting system |
| 10/25/1988 | CA1243750A1 On-line serial communication interface from a transmitter to a current loop |
| 09/13/1988 | CA1242018A1 On-line serial communication interface from a computer to a current loop |
| 09/06/1988 | CA1241723A1 On-line serial communication interface to a transmitter from a current loop |
| 08/09/1988 | US4763326 Service-integrating, digital message transmission system for joint transmission of narrow-band and broadband signals |
| 05/10/1988 | US4743901 Signal transmission system |
| 04/19/1988 | US4739309 Method and system for indicating and display information in response to electrical signals |
| 03/15/1988 | US4731798 Method for transmitting information, in which the signals are coded as amplitudes of the half-waves or periods of a sinusoidal alternating current |
| 03/01/1988 | US4729125 On-line serial communication interface to a transmitter from a current loop |
| 01/12/1988 | US4719616 Communication method and apparatus |
| 12/02/1987 | EP0247081A1 Information transmission system, encoder and decoder. |
| 11/19/1987 | WO1987007065A1 Arrangement for signal transmission in a measurement circuit |
| 11/11/1987 | EP0244807A1 Arrangement for signal transmission in a measuring arrangement |
| 10/20/1987 | US4701905 Local area network system utiliziing a code division multiple access method |
| 09/01/1987 | US4691328 On-line serial communication interface from a computer to a current loop |
| 07/27/1987 | EP0165242A4 Fiber optic digital data transmitting system. |
| 07/01/1987 | EP0227164A2 Integrated services digital information transmission system with devices for the simultaneous transmission of broad-band and narrow-band signals |
| 05/07/1987 | WO1987002849A1 Information transmission system, encoder and decoder |
| 03/19/1987 | DE3530546A1 Transmission method for a fast and a slow data stream |
| 03/11/1987 | EP0213768A2 On-line serial communication interfaces |
| 03/11/1987 | EP0213767A2 Current loop arrangements |
| 03/04/1987 | EP0212896A2 Current loop arrangements |
| 01/15/1987 | DE3525105A1 Method and circuit arrangement for transmitting information via a transmission path |
| 12/16/1986 | US4630287 Secondary channel signalling in a QAM data point constellation |
| 12/09/1986 | CA1215119A1 Fiber optic digital data transmitting system |
| 11/18/1986 | CA1214277A1 Method for the transmission of information, in which the signals are coded by way of the magnitude of the amplitudes of the half-waves or periods of a sinus- wave alternating current |
| 09/02/1986 | US4610012 Signal transmission system featuring bidirectional transmission of different signal types over a common transmission line connecting a central unit and a plurality of terminal units |
| 08/19/1986 | US4607247 On-line serial communication interface from a transmitter to a current loop |
| 03/11/1986 | CA1201769A1 Fault location arrangement for digital optical transmission system |
| 02/04/1986 | US4569045 3-Wire multiplexer |
| 12/27/1985 | EP0165242A1 Fiber optic digital data transmitting system. |
| 12/24/1985 | US4561117 Fiber optic digital data transmitting system |
| 08/06/1985 | US4534064 Fault location arrangement for digital optical transmission system |
| 06/26/1985 | EP0146440A1 Modulation method and system for the simultaneous transmission of analogous signals and digital signals |
| 06/20/1985 | WO1985002733A1 Fiber optic digital data transmitting system |
| 05/21/1985 | US4519067 Communication system providing amplifier gain by half-cycle carrier signal control |
| 02/05/1985 | US4498166 Multiplexer and demultiplexer circuits for analog signals |
| 01/29/1985 | CA1181877A1 Successive frame digital multiplexer with increased channel capacity |
| 10/16/1984 | US4477900 Digital communications system |
| 10/16/1984 | US4477896 Single-wire data transmission system having bidirectional data synchronization, and D.C. power for remote units |
| 06/13/1984 | EP0110427A2 Method of transmitting information according to which the signals are coded by the amplitude size of the half waves or the periods of a sinusoidally shaped alternating current |
| 02/21/1984 | US4433310 Modulator-demodulator for four level double amplitude modulation on quadrature carriers |
| 01/24/1984 | US4427904 Digital signal generating circuit |
| 12/13/1983 | US4420842 Fiber optic digital data transmitting system |
| 11/22/1983 | CA1157593A1 Method and apparatus for frame synchronization of a supplementary information signal transmitted by level division multiplexing |
| 11/02/1983 | EP0092957A2 Communication system |
| 08/30/1983 | CA1153118A1 Method and apparatus for code conversion of binary to multilevel signals |
| 03/08/1983 | US4376306 Frame-synchronizing method and system for recovering supplemental information from supermodulated stream of multilevel symbols |
| 12/15/1982 | EP0066947A1 Successive frame digital multiplexer with increased channel capacity |
| 12/01/1982 | EP0065849A1 Apparatus for code conversion of binary to multi-level signals |
| 07/13/1982 | US4339818 Digital multiplexer with increased channel capacity |
| 05/18/1982 | US4330856 Digital signal transmission system including means for converting asynchronous signals to the operating speed of a transmission line |
| 05/18/1982 | CA1123963A1 Digital signal transmission system |
| 10/14/1981 | EP0037556A1 Method and apparatus for frame synchronization of a supplementary information signal transmitted by level division multiplexing |
| 07/08/1981 | EP0031762A2 Modulator-demodulator for transmission by a four-level double amplitude modulation on quadrature carriers |
| 10/21/1980 | US4229830 Apparatus and method for providing a modulation format for multiple wideband signal transmission |
| 10/01/1980 | EP0016336A1 Digital signal transmission system |
| 07/17/1979 | US4161628 Technique for tracking amplitude fades for multi-amplitude signalling |
| 01/24/1978 | US4070650 Digital signal transmission system and equipment |
| 09/07/1976 | US3979561 Level-code encoded multiplexer |
| 05/04/1976 | US3955188 Encoding technique for enabling a device to process different types of digital information transmitted along a single information channel |
| 03/16/1976 | US3944931 Multi-channel frequency converter having automatic control |
| 02/24/1976 | US3940567 Multiplex transmission system on-off signal |