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Browse by Category: Main > Communications
Class Information
Number: 455/228
Name: Telecommunications > Receiver or analog modulated signal frequency converter > Responsive to an input signal of particular predetermined frequency > Responsive to specified modulation (e.g., call alarm, conelrad)
Description: Subject matter including means for indicating a predetermined modulation in the carrier.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
5164729 Police radar warning receiver with auto-mute function Nov. 17, 1992
5134406 Long range police radar warning receiver with multiple array averaging Jul. 28, 1992
5095532 Method and apparatus for route-selective reproduction of broadcast traffic announcements Mar. 10, 1992
5079553 Long range police radar warning receiver Jan. 7, 1992
5077829 Radio communication apparatus in which a particular call can be surely informed to a possessor of the apparatus Dec. 31, 1991
5060300 Receiver switchable between network supply mode and power-conserving battery supply mode Oct. 22, 1991
5054120 Receiver for personal radio paging service Oct. 1, 1991
5049884 Battery powered police radar warning receiver Sep. 17, 1991
5049885 Long range police radar warning receiver Sep. 17, 1991
5046127 Transmission path tester for broadcasting Sep. 3, 1991
5020143 Vehicular radio receiver with stored detour data May. 28, 1991
4984294 Radio communications device incorporating channel guard decode and priority channel scanning Jan. 8, 1991
4956875 Emergency radio alerting and message transmitting system directable to selected classes and numbers of receivers Sep. 11, 1990
4955080 Selectively called receiver Sep. 4, 1990
4954828 Long range police radar warning receiver Sep. 4, 1990
4939521 Dual horn, multi-band radar detector Jul. 3, 1990
4862175 Police radar signal band discrimination circuitry for a police radar warning receiver Aug. 29, 1989
4862513 Radio receiver with two different traffic information decoders Aug. 29, 1989
4829588 Automatic retransmission with pilot tone May. 9, 1989
4805231 Apparatus for detecting an electronic surveillance device Feb. 14, 1989
4802240 Synchronous receiving method for selective calling signal Jan. 31, 1989
4794394 Emergency vehicle proximity warning system Dec. 27, 1988
4709407 Band discriminating method in a receiver Nov. 24, 1987
4686707 Program identifier signal receiver Aug. 11, 1987
4683459 Alarm system test annunciator Jul. 28, 1987
4633515 Emergency broadcast alert detector Dec. 30, 1986
4633517 Circuit for decoding traffic information message tone signals Dec. 30, 1986
4561115 Decoder for traffic information regional tone signals Dec. 24, 1985
4541118 SSB System with pilot coded squelch Sep. 10, 1985
4523332 Battery saver circuit for use with paging receiver Jun. 11, 1985
4506386 Battery saver for a paging receiver or the like _ Mar. 19, 1985
4499603 Radio receiver with reception-readiness monitoring feature and method Feb. 12, 1985
4480253 Wrist watch weather radio Oct. 30, 1984
4479125 Radio paging receiver capable of muting battery saving function Oct. 23, 1984
4479261 Battery saving circuit for paging receiver Oct. 23, 1984
4476581 FM Receiver with subcarrier decoding circuit Oct. 9, 1984
4476573 Radio link remote control signaling system, and method Oct. 9, 1984
4476488 Control circuit for CATV alert system Oct. 9, 1984
4450589 FM Receiver for reception of special announcements and general programs May. 22, 1984
4449249 Televison programming information system May. 15, 1984
4449248 Battery saving radio circuit and system May. 15, 1984
4438429 Emergency signal transceiver for disabled car Mar. 20, 1984
4435845 Automobile radio and tape cassette switching apparatus Mar. 6, 1984
4435843 FM Receiver for general programs and special announcements Mar. 6, 1984
4422178 Radio communication receiver having an oscillator circuit of lower power-consumption Dec. 20, 1983
4403208 Warning-signal-producing system for a motor vehicle responsive to a vehicle-presence-indicating radio wave signal emitted by another vehicle and indicative of its presence Sep. 6, 1983
4399556 Device for locating audio surveillance apparatus Aug. 16, 1983
4392248 Attention signal receiver for emergency broadcast systems Jul. 5, 1983
4392135 Paging receivers Jul. 5, 1983
4360808 Radio control apparatus with voice transmission capability Nov. 23, 1982

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