| Patents for H04B 1 - Details of transmission systems, not covered by a single one of groups; Details of transmission systems not characterised by the medium used for transmission (188,568) |
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| 01/09/1992 | DE3645150C2 Broadcasting digital stereophonic audio signals |
| 01/08/1992 | EP0465457A2 System for providing adaptive channel frequencies in a tunnel |
| 01/08/1992 | EP0465315A1 Device for connecting an antenna to radio transceivers |
| 01/08/1992 | EP0464911A2 Radio receiver with acoustic signal |
| 01/08/1992 | EP0464839A2 Digitally multiplexed transmission system |
| 01/08/1992 | EP0464792A2 AGC circuit of FM front-end portion |
| 01/08/1992 | EP0464670A2 Sensitivity switching circuit for radio receiver |
| 01/08/1992 | EP0464534A2 Transform coder with adaptive window function |
| 01/08/1992 | CN1057742A Method and device for processing analog signal |
| 01/07/1992 | US5079768 Method for frequency sharing in frequency hopping communications network |
| 01/07/1992 | US5079559 Dual plate antenna |
| 01/07/1992 | US5079526 Frequency modulated synthesizer using low frequency offset mixed VCO |
| 01/07/1992 | CA2086822A1 Paging system |
| 01/07/1992 | CA1294071C Spread spectrum optical communication system with heterodyne detection |
| 01/07/1992 | CA1294013C Frequency modulation in phase-locked loops |
| 01/07/1992 | CA1294005C Apparatus and method for phase noise and post tuning drift cancellation |
| 01/07/1992 | CA1294002C Transmitter having pll circuit |
| 01/02/1992 | EP0463808A2 Switching of a digital signal to an alternate channel transmitted via a different route |
| 01/02/1992 | EP0463710A2 Signal attenuator |
| 01/02/1992 | EP0463656A1 A method and device for processing an analog signal |
| 01/02/1992 | EP0463625A2 Device operable with an excellent spectrum suppression |
| 01/02/1992 | EP0463621A1 Receiver for digital radio signals |
| 01/02/1992 | EP0463104A1 Dsp based radio with diminished power requirements |
| 01/02/1992 | DE4020747A1 LF noise suppression circuit for car radio amplifier stage - uses feedback circuit between output and input of power amplifier |
| 01/02/1992 | DE4020083A1 Digital transmitter modulator using modulation oscillator - has single sideband signal fed through bandpass filter and mixed with auxiliary oscillator signal |
| 01/01/1992 | CN1057557A Method for regulating power in digital mobile telephony system |
| 12/31/1991 | WO1992000637A1 Process for transmitting a time-variable control parameter |
| 12/31/1991 | US5077835 Receiver circuit |
| 12/31/1991 | US5077834 Paging receiver with continuously tunable antenna and RF amplifier |
| 12/31/1991 | US5077833 Synthesizer receiver |
| 12/31/1991 | US5077832 Radio transceiver with optional display |
| 12/31/1991 | US5077827 Warning receiver readiness monitoring circuit |
| 12/31/1991 | US5077797 Fm stereo receiver |
| 12/31/1991 | US5077754 Tau-dither circuit |
| 12/31/1991 | US5077753 Radio communication system using spread spectrum techniques |
| 12/31/1991 | US5077731 Telecommunication arrangement |
| 12/31/1991 | US5077712 DAT system |
| 12/31/1991 | US5077552 Interface for coupling audio and video equipment to computer |
| 12/31/1991 | US5077542 Transmission system with suppressed carrier signal amplitude modulation preserving the polarity of the transmitted signal, and corresponding transmitter and receiver |
| 12/31/1991 | CA2084791A1 Process for transmitting a time-variable control parameter |
| 12/31/1991 | CA1293832C Telecommunications line interface circuits |
| 12/31/1991 | CA1293829C Unitary tuning structure |
| 12/31/1991 | CA1293774C Mounting base for a telephone device, such as a mobile telephone |
| 12/27/1991 | EP0462952A1 A method for regulating power in a digital mobile telephony system |
| 12/27/1991 | EP0462782A2 Receiver for a cellular mobile radio communication system |
| 12/27/1991 | EP0462699A2 A frequency reuse, phased array antenna system for receivingtwo or more cofrequency wanted signals and suppressing cochannel interference therebetween |
| 12/27/1991 | EP0462191A1 Broadcast receiver, in particular for vehicles. |
| 12/27/1991 | EP0462166A1 Method for linking rds programme services and rds. |
| 12/27/1991 | EP0155285B1 Audio channel stacking with speech compression for narrow band transmission with provision for dialed calls |
| 12/26/1991 | WO1991020157A1 Television set |
| 12/26/1991 | WO1991020133A1 Automatic antenna tuning system and method |
| 12/25/1991 | CN1057371A New usage for radio carrier transmitting device |
| 12/25/1991 | CN1015223B Circuit arrangements for modifying dynamic range using action substitution and superposition techniques |
| 12/24/1991 | US5075095 Low pressure plasma enhanced vapor deposition; consolidation |
| 12/24/1991 | CA1293569C Method of and device for speech signal coding and decoding by subbband analysis and vector quantization with dynamic bit allocation |
| 12/24/1991 | CA1293564C Orthogonal polarization duplex microwage tranceiver front end |
| 12/24/1991 | CA1293454C Noise reduction device in an electroacoustic system |
| 12/22/1991 | CA2019678A1 Active array element amplitude stabilization |
| 12/19/1991 | DE4019248A1 Fernsehempfangsgeraet Fernsehempfangsgeraet |
| 12/18/1991 | EP0461884A2 Interference source identification |
| 12/18/1991 | EP0461720A1 Electronic arrangement for receiving a modulated carrier signal |
| 12/18/1991 | EP0461572A2 Multifunctional radio apparatus switching between different operation modes |
| 12/18/1991 | EP0461571A2 Combined radio apparatus, in particular combination of a cordless telephone and a paging receiver |
| 12/18/1991 | CN2091044U Special transmitter |
| 12/18/1991 | CN1057137A Frequency locking method for frequency converter of synthesizing type |
| 12/17/1991 | US5073977 High frequency broad-band mixing circuit including an electrolytic capacitor in parallel with a local oscillator input port |
| 12/17/1991 | US5073976 Signal-to-noise ratio indicating circuit for fm receivers |
| 12/17/1991 | US5073975 Stop on station circuit including center channel detector |
| 12/17/1991 | US5073974 Hot standby transmitter switching system using upper and lower sideband waves |
| 12/17/1991 | US5073972 Modular communications system including a portable unit range extender and selective-call system |
| 12/17/1991 | US5073944 Audio system for automotive vehicles |
| 12/17/1991 | US5073943 Automotive audio system having active controls in reduced power state |
| 12/17/1991 | US5073940 Method for protecting multi-pulse coders from fading and random pattern bit errors |
| 12/17/1991 | US5073899 Transmission system for sending two signals simultaneously on the same communications channel |
| 12/17/1991 | US5073898 Communication device |
| 12/17/1991 | US5073774 One-to-one switching system |
| 12/17/1991 | US5073773 Method of establishing a signal path between at least two apparatuses and an arrangement of at least two apparatuses for realising the method |
| 12/17/1991 | CA1293302C Gain and phase correction in a dual branch receiver |
| 12/17/1991 | CA1293299C Reconfigurable remote control transmitter |
| 12/15/1991 | WO1991019997A1 Transponder system |
| 12/13/1991 | WO1991020137A1 Communication signal having a time domain pilot component |
| 12/12/1991 | WO1991019402A1 Battery door for a selective call receiver |
| 12/12/1991 | WO1991019391A1 Broadcast receiver system |
| 12/12/1991 | WO1991019358A1 Time based signal detector |
| 12/12/1991 | WO1991019356A1 Method of preventing suppression of sensitivity of a receiver and method of preventing radio interference |
| 12/12/1991 | WO1991019348A1 Apparatus for detecting failure of an antenna amplifier unit with a hot standby redundancy |
| 12/11/1991 | EP0460862A2 Global positioning system receiver |
| 12/11/1991 | EP0460818A2 Method for preventing the oscillation of an RF power module |
| 12/11/1991 | EP0460280A2 Transmitting power control circuit |
| 12/11/1991 | CN2090593U Power load signal transmitter by microcomputer |
| 12/10/1991 | US5072308 Communication signal compression system and method |
| 12/10/1991 | CA1293071C Radio telephone apparatus |
| 12/07/1991 | CA2018522A1 Transceiver with transmitter and receiver sections sharing a common oscillator |
| 12/05/1991 | WO1991019357A1 Battery saving method and apparatus for providing selective receiver power switching |
| 12/05/1991 | DE4016640A1 Transmit-receive crossover network - uses rectifier diodes and induction to power PIN=diode(s) from signal, DC isolated from transmitter |
| 12/04/1991 | EP0459447A1 Transmitter having battery power detecting means |
| 12/04/1991 | EP0459440A2 Radio transmitter apparatus |
| 12/04/1991 | EP0459383A2 Radio receiver |
| 12/04/1991 | EP0459358A2 Speech decoder |
| 12/04/1991 | EP0458821A1 Transponder system. |