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)
09/1989
09/13/1989CN1035596A Passive universal communication
09/13/1989CN1035594A Circuit arrangement for linearly amplifying and demodulating am-modulated signal, and integrated semiconductor element for said circuit arrangement
09/12/1989US4866735 Spread spectrum communicating method
09/12/1989US4866734 Receiver for spread spectrum communication
09/12/1989US4866733 Radio bus system
09/12/1989US4866732 Wireless telephone system
09/12/1989US4866542 Remote-controlling commander with multi-function rotary dial
09/12/1989US4866415 Tone signal generating system for use in communication apparatus
09/08/1989WO1989008353A1 Improved multi-band programmable compression system
09/07/1989DE3905860A1 Spannungsueberlagerungsschaltung fuer einen elektronischen kanalwaehler oder tuner Voltage superposition circuit for an electronic tuner or kanalwaehler
09/07/1989DE3806416A1 Method for reducing so-called pre-echoes in the transmission and/or storage of acoustic signals
09/07/1989DE3806411A1 Method for transmitting an audio signal and an auxiliary signal
09/07/1989DE3806394A1 Method and circuit arrangement for controlling the phase angle between a generated code and a received code contained in a received spread-spectrum signal
09/06/1989EP0331435A2 Radio telephone apparatus
09/06/1989EP0331434A2 Radio telecommunication apparatus
09/06/1989EP0331411A2 Interference cancellation circuit
09/06/1989EP0331257A2 Universal remote control transmitter with simplified device indentification
09/06/1989EP0331234A1 Circuit arrangement for linearly amplifying and demodulating an AM-modulated signal, and integrated semiconductor element for said circuit arrangement
09/06/1989CN1035403A Cancelling circuit and transmission system
09/05/1989US4864649 Driver circuit for driving a light emitting element by superimposing an analog sub-information signal over a digital main signal
09/05/1989US4864646 Neckstrap
09/05/1989US4864643 Radio transmission system providing adjacent channel and image frequency rejection
09/05/1989US4864640 Directly mixing synchronous receiver
09/05/1989US4864639 Self-test device and method having an amplifier converted into an oscillator
09/05/1989US4864637 FMX stereophonic broadcast receiver
09/05/1989US4864635 Amplitude modulated broadcast transmitter
09/05/1989US4864634 Radio communication apparatus free from interference between local signal and transmission signal
09/05/1989US4864632 Indoor wiring system for VHF/UHF signal lines
09/05/1989US4864550 Remote control equipment for use with an audio system
09/05/1989US4864301 Variable speed transmission recording and retrieval of data
09/05/1989CA1259102A1 Receiver including a multipath transmission detector
08/1989
08/31/1989DE3901094A1 Motor vehicle broadcast receiver
08/31/1989DE3805032A1 Remote control system with a remote control unit and with at least one remotely controlled device
08/30/1989EP0330514A2 Battery powered radio devices having a battery saving function
08/30/1989EP0330063A2 Adaptive extrema coding signal processing system
08/30/1989EP0330062A1 Radio receiver for a vehicle
08/29/1989US4862516 System for automatically tuning the antenna of a miniature portable communications device
08/29/1989US4862479 Spread spectrum communication system
08/29/1989US4862478 Spread spectrum communications with resistance to multipath at differential delays both larger and smaller than a chip width
08/29/1989US4862167 Adaptive data compression method and apparatus
08/29/1989US4862118 Signal processing system using a compressor and an expander
08/29/1989US4862097 Pulsating noise removal device
08/24/1989WO1989007866A1 Method and apparatus for electrical signal coding
08/24/1989WO1989007865A1 Bandswitching a two-way radio having a pll
08/24/1989WO1989007864A1 Multipath reduction system
08/24/1989WO1989007860A1 Radio receiver for vehicles
08/23/1989EP0329513A1 Antitheft device with an IC card for a car radio
08/23/1989EP0328985A2 Warning radio receiver
08/23/1989EP0328973A2 Radio receiver
08/23/1989EP0328836A2 Pseudo-passive universal communicator system
08/23/1989CN2043435U Explosion insulation and inherently safe type duplex electronic communication equipment
08/23/1989CN1035031A Multi-frequency signal receiver
08/22/1989US4860359 Method of voice operated transmit control
08/22/1989US4860356 Adaptive extrema coding signal processing system
08/22/1989US4860354 Arrangement for decoding a stereo multiplex signal
08/22/1989US4860335 Method for notifying of a call arrival
08/22/1989US4860307 Synchronization pulse generator in spread spectrum communication system
08/22/1989US4860024 Antenna for a portable radiotelephone
08/22/1989US4860005 Communication receiver with automatic turn on/off
08/22/1989US4859967 RF power amplifier protection
08/22/1989US4859957 Method for demodulating an FM signal
08/22/1989US4858798 Carry case with quick release and self locating retainer apparatus
08/16/1989EP0328440A1 Selection system for receiving radio or television broadcasts
08/16/1989EP0327892A1 Three-way power splitter using directional couplers
08/16/1989CN2043027U Pocket radio type multifunction alarm
08/15/1989US4857917 Remote control apparatus providing leader pulse followed by data pulses
08/10/1989WO1989007369A1 Three-way power splitter using directional couplers
08/09/1989EP0327456A1 System for putting electronic packages connected to a communication channel in an operative and in a standby position
08/09/1989EP0327128A2 Data communication system having channel switching means
08/09/1989EP0326747A2 Radio data system receiver
08/09/1989EP0326746A2 Radio data system receiver
08/09/1989CN2042643U Miniature signal transmitter for car overtaking
08/09/1989CN1034650A Keyboard identfication apparatus
08/08/1989US4856089 Combined eye covering and ear covering assembly
08/08/1989US4856088 Radio with removable display
08/08/1989US4856087 Radio equipped inflatable device
08/08/1989US4856086 Radio glasses
08/08/1989US4856084 Noise blanking system for an AM radio receiver
08/08/1989US4856079 Adaptive and programmable blanker
08/08/1989US4856026 Data transmission system comprising smearing filters
08/08/1989US4855746 Multiple device remote control transmitter
08/08/1989US4855730 Component audio/video system with timed control of plural peripheral devices
08/03/1989DE3901860A1 Receiver with power-saving circuit
08/02/1989EP0326413A2 Radio telephone set used as portable set and vehicle-mounted set
08/02/1989EP0326205A2 Channel allocation controller and signal distribution network
08/02/1989EP0325759A1 Antenna selector
08/01/1989US4853972 Radio transceiver including an antenna switching circuit capable of changing reception sensitivity
08/01/1989US4853963 Digital signal processing method for real-time processing of narrow band signals
08/01/1989US4853657 Orthogonal-polarization duplex send-receive microwave head
08/01/1989US4853612 RF power control circuit
07/1989
07/27/1989WO1989006883A1 Alternating sequential half duplex communication system
07/27/1989DE3832455A1 Selection method for received frequencies of an RDS receiver
07/26/1989EP0325394A2 Transmitter having PLL circuit
07/26/1989EP0325331A2 Signal distribution network system
07/26/1989EP0325025A1 Frequency modulation in phase-locked loop
07/26/1989CN2041871U Radio intercom and telegraph transmitter (dual-purpose) for children
07/26/1989CN2041870U Timing radio set
07/25/1989US4852167 FMX stereophonic receiver
07/25/1989US4852147 Telephone apparatus
07/25/1989US4852129 Data compression system using frequency band translation and intermediate sample extrapolation
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