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Class Information
Number: 367/94
Name: Communications, electrical: acoustic wave systems and devices > Echo systems > Presence or movement only detection > By doppler effect
Description: Subject matter wherein the frequency shift of the received signal is utilized to determine presence or movement.

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8633805 Systems and methods to determine motion parameters using RFID tags Jan. 21, 2014
8619672 Apparatus and method for multi-sector velocity mobile velocity and doppler estimate for synchronous communication systems Dec. 31, 2013
8576664 Moving object detection system Nov. 5, 2013
8456318 Occupancy sensor assembly Jun. 4, 2013
8242888 Systems and methods to determine motion parameters using RFID tags Aug. 14, 2012
7855674 Method and radar system for coherent detection of moving objects Dec. 21, 2010
7839291 Water safety monitor systems and methods Nov. 23, 2010
7821870 Method and system for identifying moving objects using acoustic signals Oct. 26, 2010
7800490 Electronic article surveillance system neural network minimizing false alarms and failures to deactivate Sep. 21, 2010
7791529 System for estimating the speed of an aircraft, and an application thereof to detecting obstacles Sep. 7, 2010
7756498 Channel estimator and method for changing IIR filter coefficient depending on moving speed of mobile communication terminal Jul. 13, 2010
7746220 Moving object detection apparatus Jun. 29, 2010
7731661 Method for imaging the mechanical properties of tissue Jun. 8, 2010
7551062 Directional acoustic device Jun. 23, 2009
7480208 Occupancy sensor assembly Jan. 20, 2009
7423933 Method for visualization of echoes received by an active sonar using a line spectrum emission Sep. 9, 2008
7376210 Apparatus and method for performing adaptive channel estimation in a mobile communication system May. 20, 2008
7209529 Doppler compensated receiver Apr. 24, 2007
7180442 Target indentification method using cepstral coefficients Feb. 20, 2007
7138938 System and method for preemptively sensing an object and selectively operating both a collision countermeasure system and a parking assistance system aboard an automotive vehicle Nov. 21, 2006
7084745 Sensor system for determination of environment for motor vehicles Aug. 1, 2006
7069021 Method and a system for positioning of an electronic device, and an electronic device Jun. 27, 2006
7030806 Time domain radio transmission system Apr. 18, 2006
6965753 Apparatus for performing doppler correction in a wireless communications system Nov. 15, 2005
6909397 Stabilizing motion in a radar detection system using ultrasonic radar range information Jun. 21, 2005
6759954 Multi-dimensional vector-based occupancy sensor and method of operating same Jul. 6, 2004
6703932 Intrusion detection and warning system Mar. 9, 2004
6198385 Entering detecting system for vehicles Mar. 6, 2001
6157293 Device for detecting the intrusion of a body in a predetermined space Dec. 5, 2000
6062076 Ultrasonic monitoring method and system for wake turbulence useful at runways May. 16, 2000
5978315 Feed waste detector Nov. 2, 1999
5959534 Swimming pool alarm Sep. 28, 1999
5900834 Doppler shift detector May. 4, 1999
5856778 Intrusion detecting apparatus for a vehicle Jan. 5, 1999
5850184 Ultrasonic tool confirmation sensor Dec. 15, 1998
5821854 Security system for a personal computer Oct. 13, 1998
5684458 Microwave sensor with adjustable sampling frequency based on environmental conditions Nov. 4, 1997
5682134 Method of operating a device for monitoring the interior of an automotive vehicle Oct. 28, 1997
5646907 Method and system for detecting objects at or below the water's surface Jul. 8, 1997
5640143 Occupancy sensor and method of operating same Jun. 17, 1997
5638048 Alarm system for swimming pools Jun. 10, 1997
5598042 Moveable desktop load controller Jan. 28, 1997
5581232 Ultrasonic wave reception apparatus and obstacle detection apparatus Dec. 3, 1996
5550789 Water turbulence detector Aug. 27, 1996
5508568 Receptacle safety deenergizer Apr. 16, 1996
5483219 Alarm signal generation device for a vehicle Jan. 9, 1996
5475365 Methods and apparatus for intrusion detection having improved immunity to false alarms Dec. 12, 1995
5453740 Vehicle collision prevention system using the Doppler effect Sep. 26, 1995
5438318 Movement detector for detecting movement within a predetermined space Aug. 1, 1995
5396217 Phase shift analysis for vehicle intrusion detection Mar. 7, 1995

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