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Browse by Category: Main > Communications
Class Information
Number: 340/554
Name: Communications: electrical > Condition responsive indicating system > Specific condition > Intrusion detection > Disturbance of electromagnetic waves > Doppler effect
Description: Subject matter responsive to the frequency change of a reflected electromagnetic wave caused by motion of a reflecting object.










Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
8666420 Building wireless routing structures using out of band signaling Mar. 4, 2014
8633805 Systems and methods to determine motion parameters using RFID tags Jan. 21, 2014
8576664 Moving object detection system Nov. 5, 2013
8552865 Self-test method for a microwave module Oct. 8, 2013
8519883 Adjusting the sensitivity of a PIR sensor or a doppler radar sensor disposed within a light fixture Aug. 27, 2013
8514075 Ultrasonic receiving circuit Aug. 20, 2013
8476897 Method and system for locating a person and medium comprising instructions for performing the method Jul. 2, 2013
8390449 Intrusion detection system and sensor device thereof Mar. 5, 2013
8379782 Mobile radio channel estimation Feb. 19, 2013
8334771 Home network, area network using the same, program for computer to execute operation in home network, and computer-readable recording medium storing the program Dec. 18, 2012
8232909 Doppler radar motion detector for an outdoor light fixture Jul. 31, 2012
8217786 Checking apparatus for containers Jul. 10, 2012
8199012 Microwave curtain sensor Jun. 12, 2012
8169356 Anti-mask motion sensor May. 1, 2012
8159344 Microwave motion detectors utilizing multi-frequency ranging and target angle detection Apr. 17, 2012
8102261 Microwave ranging sensor Jan. 24, 2012
8044839 Combined radar and communications link Oct. 25, 2011
7982606 Microwave motion detector with target angle detection Jul. 19, 2011
7952474 Nuisance alarm filter May. 31, 2011
7796033 System and method for calibrating a microwave motion detector Sep. 14, 2010
7777624 Direction of travel motion sensor Aug. 17, 2010
7760089 Microwave direction of travel detector by parallel sampling Jul. 20, 2010
7760088 Intrusion detection sensor Jul. 20, 2010
7760090 Access control apparatus Jul. 20, 2010
7746220 Moving object detection apparatus Jun. 29, 2010
7737849 Switch detection device using RFID tag Jun. 15, 2010
7705730 System and method for improving microwave detector performance using ranging microwave function Apr. 27, 2010
7679509 System and method for improving infrared detector performance in dual detector system Mar. 16, 2010
7633426 Combined radar and communications link Dec. 15, 2009
7609163 Radio frequency ID Doppler motion detector Oct. 27, 2009
7492306 Boundary crossing object detection system Feb. 17, 2009
7479878 Triboelectric, ranging, or dual use security sensor cable and method of manufacturing same Jan. 20, 2009
7480208 Occupancy sensor assembly Jan. 20, 2009
7399127 Autonomous operation control system Jul. 15, 2008
7382310 Method for independently setting range resolution, Doppler resolution, and processing gain of a pseudo-random coded radar system Jun. 3, 2008
7375630 Dual technology sensor device with range gated sensitivity May. 20, 2008
7315241 Enhanced perception lighting Jan. 1, 2008
7307537 Identification tag Dec. 11, 2007
7298255 Sensory systems employing non-uniformly spaced waveguide sensors for determining orientation and rotational speed of objects Nov. 20, 2007
7277012 Broad field motion detector Oct. 2, 2007
7199749 Radar detection device employing a scanning antenna system Apr. 3, 2007
7196636 Railroad crossing warning system Mar. 27, 2007
7173537 Device for protecting against accidental contact and method for protecting against accidental contact of a displaceable part Feb. 6, 2007
7167008 Microwave sensor for object detection based on reflected microwaves Jan. 23, 2007
7129839 Device for monitoring an area Oct. 31, 2006
7126476 Dual sensor intruder alarm Oct. 24, 2006
7123145 Method and apparatus for analysing a signal from a movement detector for determining if movement has been detected in an area under surveillance and an anti-theft system Oct. 17, 2006
7034694 Body motion detector Apr. 25, 2006
6922145 Intrusion detection, tracking, and identification method and apparatus Jul. 26, 2005
6909369 Device for monitoring an area Jun. 21, 2005

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