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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
8682280 Selectable processing of broadcast EAS messages Mar. 25, 2014
8634794 Multi-user interference cancellation in a single-carrier radio receiver Jan. 21, 2014
8611839 Robust signal detection using correntropy Dec. 17, 2013
8452483 Cell-based vehicle driving control method and system May. 28, 2013
8417516 Method and apparatus for encoding and decoding high frequency signal Apr. 9, 2013
8412123 Radio opaque container for communication devices upon a vehicle Apr. 2, 2013
8315659 Method and apparatus for providing broadcast messages in a communications network Nov. 20, 2012
8170599 Format based power control May. 1, 2012
8027690 Methods and apparatus for sensing the presence of a transmission signal in a wireless channel Sep. 27, 2011
7702044 Radar detection and dynamic frequency selection Apr. 20, 2010
7630689 Electronic device Dec. 8, 2009
7599422 Adjustable dual-band link Oct. 6, 2009
7466959 Apparatus and method for IF switching in a dual-tuner, dual-IF, HD radio and FM/AM radio receiver Dec. 16, 2008
7450917 Power saving transmitter of mobile communication terminal Nov. 11, 2008
7450629 Adjustable dual-band link Nov. 11, 2008
7409461 Dynamic file-based routing in a broadband communications system Aug. 5, 2008
7113741 Optimized method of transmitting multimedia content Sep. 26, 2006
7110720 Local area internet radio receiver/transmitter Sep. 19, 2006
7061386 Air freshener dispenser equipped with an indicator circuit for indicating an incoming call on a nearby cellular telephone Jun. 13, 2006
7046975 Method and system for blind detection of modulation type May. 16, 2006
6868331 Method for outputting traffic information in a motor vehicle Mar. 15, 2005
6765486 Portable alarm system that interfaces with an individual's personal radio Jul. 20, 2004
6400305 Wide band radar detector with three-sweep input stage Jun. 4, 2002
6204761 Weather alert system Mar. 20, 2001
6157815 Method and apparatus for providing broadcast messages in a communications network Dec. 5, 2000
6115588 Radio selective calling receiver having infrared data transmission Sep. 5, 2000
6112075 Method of communicating emergency warnings through an existing cellular communication network, and system for communicating such warnings Aug. 29, 2000
6072406 Traffic light control apparatus for emergency vehicles Jun. 6, 2000
6069580 Multi-conversion radar detector having increased tuning range and self-calibrating function May. 30, 2000
6057765 Non-linear junction detector May. 2, 2000
6031467 Method in a selective call radio for ensuring reception of advertisement messages Feb. 29, 2000
6021321 Selectively called wireless receiver with plural character set storage unit Feb. 1, 2000
5929774 Combination pager, organizer and radio Jul. 27, 1999
5893056 Methods and apparatus for generating noise signals from speech signals Apr. 6, 1999
5749050 Automatic emergency alarm reception apparatus using specific frequency May. 5, 1998
5697060 Portable voice message terminal capable of transmitting pre-set text-based information Dec. 9, 1997
5697080 Method of and apparatus for selecting station in multiplexed broadcast, and receiving system Dec. 9, 1997
5600673 Circuit for discriminating received signal modulation type Feb. 4, 1997
5590407 Drive through wireless order taking system Dec. 31, 1996
5577048 Method of detecting PTY burst signal Nov. 19, 1996
5513385 Reception apparatus, signal reproducing apparatus using reception apparatus and control method thereof Apr. 30, 1996
5448774 Intermittent operation receiver Sep. 5, 1995
5438689 Radio receiver for a vehicle having improved audibility for speech Aug. 1, 1995
5410749 Radio communication device having a microstrip antenna with integral receiver systems Apr. 25, 1995
5305007 Wideband radar detector Apr. 19, 1994
5276909 Traffic information broadcast system Jan. 4, 1994
5268689 Multi-band microwave detector Dec. 7, 1993
5247700 Cellular telephone with pager Sep. 21, 1993
5241699 Electronic surveillance device detector and method using phase angle differences between two received signals Aug. 31, 1993
5181208 Computation-conserving traffic data transmission method and apparatus Jan. 19, 1993

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