Patents
Sitemap › H04 - Electric communication technique › H04B - Transmission › 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
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)
11/1993
11/10/1993EP0568939A2 FSK receiver
11/10/1993EP0568938A1 Method of the production of a disturbance-free radio-communication
11/10/1993CN2146087Y Portable multipurpose bell-controlling radio
11/09/1993WO1993023727A1 Apparatus and method for voice band reduction
11/09/1993US5261123 AM radio transmitter with a final stage tetrode
11/09/1993US5261122 Portable electronic equipment with selectively removable exchange panel and clip
11/09/1993US5261121 Portable radio transceiver system having improved adaptor and/or improved receiver signal control arrangement
11/09/1993US5261120 Method and apparatus for transmitting a signal with an offset which follows a received signal
11/09/1993US5261119 Signal level measuring system for a radio receiver
11/09/1993US5261004 Noise blanking circuit for AM stero
11/09/1993US5260980 Digital signal encoder
11/09/1993US5260974 Adaptive carrier detection
11/09/1993US5260973 For processing a baseband input signal and carrier signal
11/09/1993US5260969 Spectrum diffusion communication receiving apparatus
11/09/1993US5260967 CDMA/TDMA spread-spectrum communications system and method
11/09/1993US5260915 Wristwatch radiotelephone
11/09/1993US5260707 Phase coherent interference signal suppression system and method
11/09/1993US5260681 Paging receiver with resonant box
11/09/1993CA2001020C Battery housing with integral latch and positive displacement apparatus
11/05/1993CA2067977A1 Remote control organizer
11/03/1993EP0568393A2 Radio communication apparatus
11/03/1993EP0568290A1 Audio coding device and method therefor
11/03/1993EP0568066A1 A method of interrogating a plurality of transponders arranged in the transmission range of an interrogating device and transponders for use in the said method
11/03/1993EP0567638A1 Adaptive power control for a spread spectrum communications system and method
11/03/1993EP0567593A1 Method and apparatus for enhancing hygiene
11/03/1993EP0567459A1 Antenna pattern selection for optimized communications and avoidance of people
11/03/1993EP0516741A4 Hybrid analog/digital signal processing
11/03/1993CN2145479Y Extension telephone of intercommunication telephone
11/03/1993CN2145478Y Glasses Radio
11/03/1993CN1022661C Automatically activated commercial message timer
11/03/1993CA2095283A1 Method for producing an interference-free radio connection
11/02/1993WO1993022846A1 Wireless device
11/02/1993US5258999 Circuit and method for receiving and transmitting control and status information
11/02/1993US5258997 Spread spectrum apparatus
11/02/1993US5258996 Spread spectrum apparatus
11/02/1993US5258892 Molded-in antenna with solderless interconnect
11/02/1993US5258762 Identification system using hertzian waves, consisting of an interrogation station and a responder unit
11/02/1993CA2095284A1 Method of and apparatus for two-way radio communication amongst fixed base and mobile terminal users employing meteor scatter signals for inbound communications from the mobile terminals and outbound communications from the base terminals via loran communication signals combined with loran navigational transmissions
11/02/1993CA2005655C Hot standby transmitter switching system
10/1993
10/31/1993CA2067624A1 Radio pager holster assembly
10/28/1993WO1993021693A1 Frequency offset method and apparatus for use in a transceiver
10/27/1993EP0567265A1 Radio receiver
10/27/1993EP0567211A2 Adaptive receiver for multipath fading channels
10/27/1993EP0566603A1 Radio transceiver system.
10/27/1993EP0554386A4 Receiver with battery saver
10/27/1993CN1077828A Voice transmission method and apparatus in duplex radio system
10/26/1993US5257415 Automatic transmission level control device
10/26/1993US5257413 Option selection method and apparatus
10/26/1993US5257411 Radio frequency switching device
10/26/1993US5257410 Communication device with ISDN interface
10/26/1993US5257409 Frequency synthesizer with programming feedback
10/26/1993US5257312 Time-discrete stereo decoder
10/26/1993US5257292 Circuit arrangement for influencing the frequency response of a digital audio signal
10/26/1993US5257285 Transimpedance pre-amplifier and a receiver including the pre-amplifier
10/26/1993US5257029 Transmission power control method and apparatus in satellite communication
10/26/1993US5256955 Household and onboard vehicle power outlet-based battery charger for portable telephone
10/26/1993US5256919 Method for preventing the oscillation of an RF power module
10/25/1993WO1993022881A1 Method and apparatus for determining signal transmission quality levels of a transmitted signal
10/22/1993EP0586374A4 Method and apparatus for synchronizing simulcast systems.
10/20/1993EP0566516A1 Multimodal remote control device having electrically alterable keypad designations
10/20/1993EP0566139A1 Communications system for communications between an electronic control apparatus and a test apparatus
10/20/1993EP0566128A2 Car stereo having a detachable operating device
10/20/1993EP0565947A1 Procedure for including digital information in an audio signal prior to channel coding
10/20/1993EP0557297A4 Method and apparatus for modulating and dectecting a subcarrier signal for an inductively coupled transponder
10/20/1993EP0538456A4 Receiver with signal classifier
10/20/1993CN2144374Y C wave band atmospheric temp FET low-noise amplifier
10/20/1993CN2144373Y Automatic turn-off device for radio cassette recorder
10/20/1993CN1077579A Frequency offset method and apparatus for use in a transceiver
10/20/1993CN1077576A Use of a vcxo in the base unit of a two-handset cordless telephone system
10/20/1993CN1022532C Controller for G3 type simplex radio facsimile
10/20/1993CN1022530C Mounting assembly for transceiver
10/19/1993US5255319 Noise suppressing circuit in an FM tuner
10/19/1993US5255317 ISND (Integrated Services Digital Network) and POTS (Plain Old Telephone
10/19/1993US5255316 Hands-free telephone apparatus
10/19/1993US5255313 Universal remote control system
10/19/1993US5255180 Control apparatus for systematically operating audio and/or video sets
10/19/1993US5255094 Muting circuit for eliminating transient signals generated due to power supply turn-on and turn-off
10/19/1993US5255078 Impulse noise detector for a video signal receiver
10/19/1993US5254997 Retrodirective interrogation responsive system
10/19/1993US5254962 Combined acoustic wave device and ceramic block filter structure
10/18/1993CA2094077A1 Diversity antenna having an electric field antenna and a magnetic field antenna
10/14/1993WO1993020628A1 Slot hopped fd/td/cdma
10/14/1993WO1993020624A1 Communications system with extended channels
10/14/1993WO1993020622A1 Squelch detector
10/14/1993WO1993020621A1 Method and apparatus for intermodulation noise suppression in rf power amplifiers
10/14/1993WO1993020616A1 A method for tuning an rf bandpass filter
10/14/1993WO1993020546A1 Electronic tourist voice guide system
10/14/1993DE4239271A1 Anti-theft system for vehicle using transmitted signals - has transmitter initiated by signal when object removed ,which provides identification data and also GPS location data
10/14/1993CA2102408A1 Communications system with extended channels
10/14/1993CA2087503A1 Multimodal remote control device having electrically alterable keypad designations
10/13/1993EP0565479A1 Multi-channel signal separation using cross-polyspectra
10/13/1993EP0565362A1 Frequency tuning with synthesizer
10/13/1993EP0565325A1 AFC circuit and IC of the same
10/13/1993EP0565256A1 Multipath noise minimiser for radio receiver
10/13/1993EP0565255A1 Multipath detector using phase comparison of stereo pilot signal
10/13/1993EP0565240A1 Differential signal receiver circuit and method
10/13/1993EP0565104A2 Interference canceller with feedforward transversal filter having switched tap-gain coefficients
10/13/1993EP0564874A1 Two-way communications earset with filter
10/13/1993EP0564849A1 System and method of robust sequence estimation in the presence of channel mismatch conditions
10/13/1993EP0554349A4 Carry case assembly for a portable electrical device
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