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)
12/1989
12/26/1989US4890298 Troposcatter modem receiver
12/26/1989US4890297 Burst jammer erasure circuit for spread spectrum receivers
12/26/1989US4890282 Mixed mode compression for data transmission
12/26/1989US4890114 Antenna for a portable radiotelephone
12/26/1989US4890065 Relative time delay correction system utilizing window of zero correction
12/26/1989US4890010 Matched current source serial bus driver
12/21/1989DE3919302A1 Einrichtung zum uebertragen von bildinformation Means for carry over of picture information
12/21/1989DE3838790C1 Protective housing arrangement for a microwave converter
12/21/1989DE3818749A1 Fm-empfangsteil FM receiver unit
12/21/1989DE3818748A1 Fm-empfangsteil FM receiver unit
12/20/1989EP0347166A2 Method & apparatus for reducing power consumption in a radio telecommunication apparatus
12/20/1989EP0347069A2 Data path protection
12/20/1989EP0346986A2 A zero IF receiver
12/20/1989EP0346868A2 Time shared power amplifier
12/20/1989EP0346672A2 Monolithic ceramic filter with bandstop function
12/20/1989EP0346639A2 Portable radiotelephone with control switch disabling
12/20/1989EP0346495A1 Television tuner
12/20/1989CN1038184A Adaptive extrema coding signal processing system
12/19/1989US4888819 Television on channel selecting apparatus with sequential selection of auxiliary signal source
12/19/1989US4888788 Transmitting and receiving systems
12/19/1989US4888787 Receiver apparatus for spread spectrum communication systems
12/19/1989US4888557 Digital subharmonic sampling down-converter
12/14/1989WO1989012357A1 Fm reception unit
12/14/1989WO1989012356A1 Fm reception unit
12/14/1989WO1989012355A1 Fm receptor unit
12/14/1989WO1989012354A1 Fm receptor unit
12/14/1989WO1989012353A1 Fm receptor unit
12/14/1989WO1989012352A1 Fm reception unit
12/13/1989EP0345940A2 A frequency signal synthesiser
12/13/1989EP0345365A1 Digital deemphasis circuit
12/13/1989EP0345303A1 Adaptive thermal protection for a power amplifier by remote sense
12/13/1989EP0188504B1 Adaptive antenna array
12/13/1989CN2049444U Multi-program sequential transmitter
12/13/1989CN1038003A Method and apparatus for encoding and decoding information signal
12/12/1989US4887311 Radio with options board
12/12/1989US4887297 Apparatus for processing stereo signals and universal AM stereo receivers incorporating such apparatus
12/12/1989US4887086 Combination scanner and radar detector
12/12/1989CA1263900A1 Subscriber unit for wireless digital telephone system
12/07/1989DE3915152A1 Car radio receiver
12/07/1989DE3819057A1 Housing comprising a housing upper part and a housing lower part
12/07/1989DE3817864A1 Method for the transmission of an audio signal
12/06/1989EP0344794A2 Apparatus and method for processing simultaneous radio frequency signals
12/06/1989EP0344539A2 Control technique for an rf communication system
12/06/1989EP0344524A1 Radio fitted in a motor vehicle
12/06/1989CN2049053U Hosehold multipurpose device
12/05/1989US4885803 System and method for controlling a plurality of electronic entertainment devices
12/05/1989US4885802 Wristwatch receiver architecture
12/05/1989US4885800 Transmitter attachment for hunting arrows
12/05/1989US4885799 Load pull isolation switch for a fast locking synthesizer
12/05/1989US4885796 Communication apparatus for use in hazardous environments
12/05/1989US4885579 Device for the remote control of a videorecorder or a videoreceiver
12/05/1989CA1263707A1 Am-rf transmitter with compensation for power supply variations
11/1989
11/30/1989WO1989011759A1 Process for transmitting an audio signal
11/30/1989WO1989011756A1 Automatically self-calibrating oscillators in heterodyned radio receivers
11/30/1989DE3903262A1 Receiving system for a satellite broadcasting system
11/30/1989DE3817752A1 Noise block
11/30/1989DE3817621A1 Remote control system with a battery-fed or accumulator-fed remote control unit
11/29/1989EP0343571A2 Mobile station for an automobile telephone system
11/29/1989EP0343528A2 Mobile telephone terminal
11/29/1989EP0343156A1 Multiple frequency radio system employing pulse repeaters
11/29/1989CN2048652U Mini integrated wireless transmission device
11/29/1989CN1005955B Universal remote control unit with model identification capability and its method
11/29/1989CN1005951B 遥控传送器 Remote Transmitter
11/28/1989US4884284 Spread spectrum receiver
11/28/1989US4884252 Timepiece including an antenna
11/23/1989EP0343031A1 Process and device for compressing the spectrum of an angle-modulated signal having a modulation index equal to 1/2 and using a direct-sequence spread spectrum
11/23/1989EP0342686A2 Processor based linked compressor-expander telecommucications system
11/23/1989DE3815970A1 Transportable radio set
11/23/1989DE3815770A1 Method and circuit arrangement for the control of the phase position on receipt of a spectrally expanded signal
11/22/1989CN2048267U Strip bay on optical communication terminal unit or/and electric communication terminal unit
11/22/1989CN1037407A Timepiece including antenna
11/21/1989US4882769 AM/FM radio with sunglass housing
11/21/1989US4882768 FM communication device with avoidance of interference by substantially same channel FM signal
11/21/1989US4882767 Stabilized transmitter
11/21/1989US4882762 Multi-band programmable compression system
11/21/1989US4882730 TDMA communication system having common time slots for system maintenance
11/21/1989US4882554 Multi-drop type bus line system
11/21/1989US4882550 Oscillator/amplifier connecting structure
11/21/1989CA1263148A1 Radio transmitter-receiver system for increasing or decreasing communication channels
11/21/1989CA1263147A1 Channel-system exchange system for digital data radio- communication system
11/20/1989EP0318478A4 Multiple resonator component-mountable filter.
11/16/1989WO1989011181A1 Method and system for signal detection
11/16/1989DE3815709A1 Im zeitbereich arbeitendes radarsystem In the time-domain working radar system
11/16/1989DE3815680A1 Frequency modulator for periodic signals
11/15/1989EP0342049A2 Power supply control circuit for use in vehicle equipment
11/15/1989EP0341239A1 Antenna tuning apparatus for personal communications devices.
11/15/1989EP0341238A1 Automatic antenna tuning system for portable communication devices.
11/15/1989EP0191836B1 Movable apparatus for sound wiring and/or visualization
11/15/1989CN2047864U Overtaking signal receiver using tone decoder
11/14/1989US4881274 FM multipath noise reduction circuit
11/14/1989US4881273 RDS system radio
11/14/1989US4881272 Multi-band FM receiver for receiving FM broadcasting signals and TV broadcasting sound signals
11/14/1989US4881262 Electronic hybrid circuit
11/14/1989US4881258 Portable type mobile radio telephone
11/14/1989US4881240 AM equalizer circuit for digital systems
11/14/1989US4881162 Frequency control system
11/14/1989US4881150 Housing and holder assembly for a portable communication apparatus
11/14/1989US4880712 Battery housing
11/14/1989CA1262941A1 Tag device and method for electronic article surveillance
11/08/1989EP0341128A1 Method and apparatus for speech signal detection
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