| 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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| 07/28/1993 | EP0552316A1 Circuit for reducing intermodulation on the use of semiconductor lasers for optical information transmission |
| 07/28/1993 | CN2139326Y Wireless remotecontrol light-regulating and speed-regulating switch |
| 07/28/1993 | CN1074789A Temp. compensation method for radio frequency power controlling circuit |
| 07/27/1993 | US5231699 Dual watch radio system |
| 07/27/1993 | US5231646 Communications system |
| 07/27/1993 | US5231486 Data separation processing in a dual channel digital high definition television system |
| 07/27/1993 | CA1320770C Transmission system for sending two signals simultaneously on the same communications channel |
| 07/23/1993 | WO1993015590A1 Radio with silent and audible alerts |
| 07/22/1993 | WO1993014590A1 Cdam/tdma spread-spectrum communications system and method |
| 07/22/1993 | WO1993014589A1 An electronic apparatus having keyless control |
| 07/22/1993 | WO1993014585A1 Frequency synchronized bidirectional radio system |
| 07/22/1993 | WO1993014578A1 Radio receiver for forming a baseband signal of time-varying frequencies |
| 07/22/1993 | WO1993014574A1 Optical transmission system |
| 07/22/1993 | WO1993014573A1 Integrated radio architecture |
| 07/22/1993 | WO1993014567A1 Remote control equipped with a device for the visual display of selected functions |
| 07/22/1993 | WO1993014492A1 Method and apparatus for encoding, decoding and compression of audio-type data |
| 07/22/1993 | WO1993014474A1 Method and device for electronic identification |
| 07/22/1993 | DE4244630A1 Amplifier with narrow band, IF filter - picks up harmonic heterodyne wave adjacent to required signal |
| 07/22/1993 | CA2128432A1 Method and device for electronic identification |
| 07/21/1993 | EP0552039A1 Transmitter tuning |
| 07/21/1993 | EP0552005A1 Method and apparatus for noise burst detection in a signal processor |
| 07/21/1993 | EP0551705A2 Method for subbandcoding using synthetic filler signals for non transmitted subbands |
| 07/21/1993 | EP0551422A1 Automatic length-reducing audio delay line |
| 07/21/1993 | EP0551363A1 A method for maximizing channel selection in a communication system. |
| 07/21/1993 | CN1074570A Method and apparatus for noise burst detection in a signal processor |
| 07/20/1993 | US5230099 System for controlling phase and gain errors in an i/q direct conversion receiver |
| 07/20/1993 | US5230097 Offset frequency converter for phase/amplitude data measurement receivers |
| 07/20/1993 | US5230096 Radio receiver antenna arrangements |
| 07/20/1993 | US5230095 Radio receiver for data communication |
| 07/20/1993 | US5230094 Method and apparatus for intermediate frequency selection in a heterodyne receiver |
| 07/20/1993 | US5230093 Transmitter filter with integral directional coupler for cellular telephones |
| 07/20/1993 | US5230092 Read/write device and apparatus and method for reading from and writing into the device |
| 07/20/1993 | US5230090 Transmission-reception separating filter with a pin diode |
| 07/20/1993 | US5230089 Automated voice operated transmitter control |
| 07/20/1993 | US5230088 Radio transceiver and related method of frequency control |
| 07/20/1993 | US5230077 Method of reducing the power requirements in a mobile radio receiver |
| 07/20/1993 | US5230038 Low bit rate transform coder, decoder, and encoder/decoder for high-quality audio |
| 07/20/1993 | US5230016 Holder for portable electronic equipment |
| 07/20/1993 | US5230011 Receiver |
| 07/20/1993 | CA1320604C Transmitter circuit for efficiently transmitting communication traffic via phase modulated carrier signals |
| 07/20/1993 | CA1320536C Apparatus and method for processing simultaneous radio frequency signals |
| 07/20/1993 | CA1320535C Interference cancellation circuit |
| 07/19/1993 | CA2087231A1 Method and circuit arrangement for offset correction in a tdma radio receiver |
| 07/15/1993 | DE4300504A1 Electronic locking system for such as radio receivers - has built in security code unit that is activated following power supply disconnection and requires code entry. |
| 07/14/1993 | EP0550912A2 Use of a voltage controlled crystal oscillator in the base unit of a two-handset cordless telephone system |
| 07/14/1993 | EP0466689B1 Band rejection filtering arrangement |
| 07/14/1993 | CN1074318A Gain control circuit for radio transmitter |
| 07/14/1993 | CN1074314A Improvements in battery charging |
| 07/13/1993 | US5228077 Remotely upgradable universal remote control |
| 07/13/1993 | US5228074 Dual mode cellular telephone apparatus |
| 07/13/1993 | US5228056 Synchronous spread-spectrum communications system and method |
| 07/13/1993 | US5228053 Spread spectrum cellular overlay CDMA communications system |
| 07/13/1993 | US5227990 Process for transmitting and receiving a signal |
| 07/08/1993 | WO1993013605A1 Radio communications apparatus with diversity |
| 07/08/1993 | WO1993013604A1 Cellular phone battery packs with and without integral microphone |
| 07/08/1993 | DE4233789A1 Vehicle stereo visual display control system - locks separation of data input port from data output when connection between system input and output ports exists |
| 07/08/1993 | CA2126574A1 Radio communications apparatus with diversity |
| 07/07/1993 | EP0550394A2 A mobile telecommunication system having an auxiliary routing arrangement |
| 07/07/1993 | EP0550146A1 Digital block processor for processing a plurality of transmission channels in a wireless radiotelephony system |
| 07/07/1993 | EP0550122A1 Auxiliary antenna |
| 07/07/1993 | EP0549926A1 Radio transceiver with additional functions |
| 07/07/1993 | CN1021534C Zero passage signal homomorphic treating method |
| 07/06/1993 | US5226178 Compatible noise reduction system |
| 07/06/1993 | US5226137 Electronic key with multiple password protected sub-keys using address and translation to implement a block data move between public and protected sub-keys |
| 07/06/1993 | US5226090 Voice-operated remote control system |
| 07/06/1993 | US5226088 Apparatus and methods for active noise suppression in stereo multiplex signals |
| 07/06/1993 | US5226061 Transmitters and transmitter circuits |
| 07/06/1993 | US5226057 Receiver and adaptive digital notch filter |
| 07/06/1993 | US5225906 Circuit for image signal transmission and reception by adaptive modulation and a method therefor |
| 07/06/1993 | CA1319958C Portable radio apparatus having battery saved channel scanning function |
| 07/06/1993 | CA1319957C2 Subscriber unit for wireless digital telephone system |
| 07/01/1993 | WO1993013613A1 Gain control circuit for radio transmitter |
| 07/01/1993 | DE4244136A1 Integrated laminated microwave circuit for motor vehicle communication system - has antenna circuit on one side of substrate with transmit and receive circuit on other side |
| 07/01/1993 | DE4243726A1 Latch unit for mounting user panel on front of car radio - has panel hinge freely about bottom edge with releasable latch on top edge |
| 06/30/1993 | EP0549404A1 Circuit for increasing the dynamic for a channel transmitting a broadband analogue impulse signal and its application to an optical transmission system of several impulse signals |
| 06/30/1993 | EP0549192A1 Spurious frequency suppressor |
| 06/30/1993 | EP0548975A1 Portable radio and telephones having notches therein |
| 06/30/1993 | EP0548885A2 TDMA-TDD transmitter-receiver |
| 06/30/1993 | EP0548844A2 Satellite broadcasting reception system |
| 06/30/1993 | EP0548663A1 Compact, especially portable, radio transceiver with retractable or collapsible antenna |
| 06/30/1993 | EP0548221A1 Radio telephone system supporting busy and out-of-range functions. |
| 06/30/1993 | CN1073809A Antenna controlling apparatus and method thereof |
| 06/30/1993 | CN1021496C Automatic control circuit for frequency-variable receiver |
| 06/29/1993 | US5224152 Power saving arrangement and method in portable cellular telephone system |
| 06/29/1993 | US5224122 Method and apparatus for canceling spread-spectrum noise |
| 06/29/1993 | US5224121 Rolling synthesizer method for baseband slow frequency hopping |
| 06/29/1993 | US5224120 Dynamic capacity allocation CDMA spread spectrum communications |
| 06/29/1993 | US5224076 Wristwatch radiotelephone |
| 06/27/1993 | WO1993013044A1 Higher aldehyde separation process |
| 06/27/1993 | CA2126749A1 Higher aldehyde separation process |
| 06/24/1993 | WO1993012618A1 Portable messaging and scheduling device with homebase station |
| 06/24/1993 | WO1993012599A1 Embedded signalling |
| 06/24/1993 | WO1993012569A1 Electronic device with dual purpose regulator |
| 06/24/1993 | DE4142301A1 Miniature UHF radio receiver with automatic transmitter search - has two operating controls providing automatic search mode in higher frequency direction and resetting to UHF range |
| 06/24/1993 | DE4141730A1 Miniature pocket radio receiver used with headphones - has sliding holder attached to headphone wire leads to provide loop worn around neck of user |
| 06/23/1993 | EP0547832A1 Dynamic range extension system |
| 06/23/1993 | EP0547408A1 Car radio |
| 06/23/1993 | CN2137052Y Correlation processing receiver |
| 06/23/1993 | CN1021392C Diode-triode mixture detector |
| 06/22/1993 | US5222255 Intermodulation controller for radio receiver |