| 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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| 03/31/1993 | EP0533721A1 Television set. |
| 03/31/1993 | EP0216803B1 Digital zero-if selectivity section |
| 03/31/1993 | CN1070523A Radio pager with variable gain setting controlled according to presence and absence of sync codes |
| 03/30/1993 | US5199110 Transmitting power control circuit |
| 03/30/1993 | US5199109 Multi channel scanning receiver with improved signal strength detecting circuitry |
| 03/30/1993 | US5199108 Lower power AM band broadcast station |
| 03/30/1993 | US5199078 Method and apparatus of data reduction for digital audio signals and of approximated recovery of the digital audio signals from reduced data |
| 03/30/1993 | US5199048 Noise canceler for keying pulse in CATV converter |
| 03/30/1993 | US5199045 Communication apparatus |
| 03/30/1993 | US5199044 System for detecting position of object having data carrier |
| 03/30/1993 | US5198658 Transimpedance amplifier-input stage for an optical receiver |
| 03/30/1993 | CA1315402C System of orthogonal code generators, radios provided with a code generator and code generators of such a system |
| 03/30/1993 | CA1315343C Radio telephone apparatus |
| 03/28/1993 | CA2073375A1 Universal processing module for programmable radio's |
| 03/25/1993 | DE4231163A1 Fehlertolerantes mehrstations-uebertragungssystem A fault-tolerant more stations-transmission system |
| 03/25/1993 | DE4230347A1 Integrated circuit tuner for HF superheterodyne receiver - derives sampling signal for phase=locked=loop from common VHF-UHF amplifier output connection within IC |
| 03/24/1993 | EP0533435A1 Radio telephone apparatus with frequency divider used during emission and stopped during reception |
| 03/24/1993 | EP0533395A1 A cellular radio communication system with different modulation according to cell size |
| 03/24/1993 | EP0533335A1 Switch circuits |
| 03/24/1993 | EP0533167A2 Optical communication system having transmission line switching system |
| 03/24/1993 | EP0533098A1 Control of an apparatus by actuator check via microcomputer, especially for car radio |
| 03/24/1993 | EP0532826A2 Emergency calling device |
| 03/24/1993 | EP0532712A1 Battery saving method and apparatus for providing selective receiver power switching |
| 03/24/1993 | EP0532575A1 Apparatus for detecting failure of an antenna amplifier unit with a hot standby redundancy. |
| 03/24/1993 | EP0532552A1 Time based signal detector |
| 03/24/1993 | CN2128808Y Duplex wire intercom machine |
| 03/24/1993 | CN2128807Y Three-purpose apparatus for hypnotizing, hearing aid, recepting |
| 03/24/1993 | CN1070297A Reduce noise interference during handoff |
| 03/23/1993 | US5197047 Automatic transmission system multi-channel scheduling |
| 03/23/1993 | US5196808 RF amplifier protector and method |
| 03/23/1993 | US5196596 Higher aldehyde separation process |
| 03/23/1993 | US5195634 Remote control holder |
| 03/23/1993 | CA1314940C Protective casing for a hand-held portable radio telephone |
| 03/23/1993 | CA1314936C Universal remote control transmitter with simplified device identification |
| 03/20/1993 | CA2078646A1 Fault tolerant multi-drop communications system |
| 03/18/1993 | WO1993005584A1 Frequency-modulated transceiver |
| 03/18/1993 | WO1993005583A1 An integrated circuit including a surface acoustic wave transformer and a balanced mixer |
| 03/18/1993 | WO1993005582A1 Baby monitor receiver |
| 03/18/1993 | WO1993005581A1 Baby monitor transmitter |
| 03/18/1993 | DE4223906A1 Signal processor for audio reproduction, e.g. for CD player - has detector to identify pre-emphasis based on 4 bit code to control de-emphasiser coupled to amplifier gain control |
| 03/18/1993 | CA2051558A1 Retractable, foldable audio equipment |
| 03/17/1993 | EP0532409A1 Spread spectrum bidirectional transmission system |
| 03/17/1993 | EP0532400A1 Discriminator with a truncated frequency characteristic |
| 03/17/1993 | EP0532203A1 Power controller |
| 03/17/1993 | EP0531918A2 Operation indicative background noise in a digital receiver |
| 03/17/1993 | EP0531725A2 Multiantenne VHF receiver |
| 03/17/1993 | EP0531645A2 Portable transaction terminal |
| 03/17/1993 | EP0531538A1 Method of encoding digital signals |
| 03/17/1993 | EP0531405A1 Broadcast receiver system. |
| 03/17/1993 | CN1070072A Communications apparatus |
| 03/17/1993 | CN1070071A 便携式声响系统 Portable sound system |
| 03/16/1993 | US5195183 Data communication system with communicating and recharging docking apparatus for hand-held data terminal |
| 03/16/1993 | US5195132 Telephone network speech signal enhancement |
| 03/16/1993 | US5195109 Digital radio receiver with program-controlled mixing oscillator frequency |
| 03/16/1993 | US5195105 Spread spectrum receiver |
| 03/16/1993 | US5195065 Function setting method for audio system |
| 03/16/1993 | US5194998 Signal processing apparatus including deemphasis processing |
| 03/16/1993 | US5194829 Radio set with easily selected oscillator frequency |
| 03/16/1993 | US5194825 Protective circuit for the input transistor of a reception amplifier in nuclear magnetic resonance systems |
| 03/11/1993 | DE4130000A1 Signal processor with I/O for digital telephone communication - has number of serial and parallel data interfaces in I/O unit together with clock generator coupled to control stages |
| 03/11/1993 | DE4129886A1 Keyboard controlled remote controller for range of appliances - has keyboard and display offering menu that is easily accessed and used for function selection |
| 03/10/1993 | EP0531164A1 Portable radio communication apparatus |
| 03/10/1993 | EP0531125A2 Radio transceiver |
| 03/10/1993 | EP0531094A2 Integrated cellular telephone and vehicular audio system |
| 03/10/1993 | EP0531028A2 Multi-transmitter wide-area cellular broadcast communication system |
| 03/10/1993 | EP0530916A2 Encoding method and encoding system comprising a subband coder for subband coding of a wideband digital signal constituted by first and second signal components |
| 03/10/1993 | EP0530914A2 Transceiver arrangement for mutually transmitting information in a DC isolated manner |
| 03/10/1993 | EP0530912A1 Receiver with analog compression and digital expansion |
| 03/10/1993 | EP0530719A1 Support for a portable telephone in a vehicle |
| 03/10/1993 | EP0530342A1 Dynamic range compression |
| 03/09/1993 | US5193223 Power control circuitry for a TDMA radio frequency transmitter |
| 03/09/1993 | US5193221 Signal output apparatus |
| 03/09/1993 | US5193219 Vehicular power booster circuitry for multi-level portable transceiver |
| 03/09/1993 | US5193218 Signal transmission reception switching apparatus |
| 03/09/1993 | US5193217 Low voltage IC for voice operated transceiver |
| 03/09/1993 | US5193213 FM broadcast band subcarrier receiver |
| 03/09/1993 | US5193212 Circuit for saving battery for use in a radio paging receiver and method thereof |
| 03/09/1993 | US5193210 Low power RF receiver |
| 03/09/1993 | US5193208 Signal transmission system |
| 03/09/1993 | US5193102 Method and apparatus for improving detection of data bits in a slow frequency hopping communication system |
| 03/09/1993 | US5192999 Multipurpose computerized television |
| 03/09/1993 | US5192919 Transmitter having a temperature adjusted power amplifier |
| 03/09/1993 | US5192918 Interference canceller using tap-weight adaptive filter |
| 03/09/1993 | US5192285 Method for insertion of a transponder into a living being |
| 03/09/1993 | US5192042 Holder for VCR and TV remote controls |
| 03/07/1993 | CA2076942A1 Multi-transmitter wide-area cellular broadcast communication system |
| 03/05/1993 | CA2077287A1 Telecommunication system comprising a transceiver arrangement for mutually transmitting information in a dc isolated manner, and transceiver arrangement to be used in the telecommunicaion system |
| 03/04/1993 | WO1993005543A1 Radio equipment directional coupler |
| 03/04/1993 | WO1993004546A1 Radio information and communication system using multicarrier spread-spectrum transmission system |
| 03/04/1993 | WO1993004540A1 System for short-range transmission of signals over the air using a high frequency carrier |
| 03/04/1993 | WO1993004538A1 A method of encoding and decoding a glassy alloy strip to be used as an identification marker |
| 03/04/1993 | WO1993004537A1 Burst mode receiver control |
| 03/04/1993 | WO1993004536A1 Modem |
| 03/04/1993 | DE4129011A1 Transmission appts. with several transmitters, e.g for ship or aircraft - has frequency selector and common aerial with various transmitters tunable to same or at least overlapping frequency ranges |
| 03/04/1993 | DE4128972A1 Radio appts. for portable satellite communication system - has briefcase-type base housing containing radio equipment and compass, connected by stay for angular alignment to lid with planar aerial array |
| 03/04/1993 | CA2119264A1 System for short-range transmission of signals over the air using a high frequency carrier |
| 03/03/1993 | EP0530024A1 Audio visual apparatus |
| 03/03/1993 | EP0529767A1 Digital radio communication apparatus |
| 03/03/1993 | EP0529759A2 Single frequency, duplex/multiplex radio communication system |
| 03/03/1993 | EP0529374A1 Broadcast receiver with provision for time delayed recording of audio signals |