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Browse by Category: Main > Communications
Class Information
Number: 367/128
Name: Communications, electrical: acoustic wave systems and devices > Distance or direction finding > With electromagnetic wave
Description: Subject matter in which a signal is transmitted through space in the form of electromagnetic waves.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8675451 Acoustic and optical illumination technique for underwater characterization of objects/environment Mar. 18, 2014
8641197 Acoustical receiver and pen transcription system adapted for rejecting virtual pen images Feb. 4, 2014
8638642 Identity tracking process and system Jan. 28, 2014
8594572 Wireless electric power transmission through wall Nov. 26, 2013
8525690 Synchronized telemetry from a rotating element Sep. 3, 2013
8478319 Feature extraction and data compression system and method for distributed sensor networks Jul. 2, 2013
8479059 Radio communication device, radio communication system, program and radio communication method Jul. 2, 2013
8427905 Optimum pseudo random sequence determining method, position detection system, position detection method, transmission device and reception device Apr. 23, 2013
8412048 Surface and sub-surface wave front management Apr. 2, 2013
8392108 Apparatus and method for allocating a current measurement value for a geographical position to a map object Mar. 5, 2013
8379485 Compressive sensing system and method for bearing estimation of sparse sources in the angle domain Feb. 19, 2013
8351297 Systems and methods of automated correlation of weapon fire data with monitored persons-of-interest/location data Jan. 8, 2013
8324517 Pen transcription system utilizing a spatial filter for limiting interference Dec. 4, 2012
8269669 Method for retrieving a geographical point on the seabed Sep. 18, 2012
8228760 Airborne laser-acoustic mine detection system Jul. 24, 2012
8223590 Airborne laser-acoustic mine detection system Jul. 17, 2012
8203911 Acoustic and optical illumination technique for underwater characterization of objects/environment Jun. 19, 2012
8203910 Autonomous ultrasonic indoor location system, apparatus and method Jun. 19, 2012
8179742 Listening with multiple computing devices May. 15, 2012
8174931 Apparatus and method for providing indoor location, position, or tracking of a mobile computer using building information May. 8, 2012
8174933 Listening with multiple computing devices May. 8, 2012
8149156 System and method for estimating location of projectile source or shooter location Apr. 3, 2012
8134888 Method and apparatus of location tracking Mar. 13, 2012
8134889 Systems and methods for augmenting gunshot location using echo processing features Mar. 13, 2012
8120994 Digital transcription system utilizing acoustical detectors having apertures with a vertical orientation relative to the work surface Feb. 21, 2012
8111584 Optical sensing arrangements Feb. 7, 2012
8089827 Method for localizing remote devices, using acoustical and electromagnetic waves Jan. 3, 2012
8064290 Digital transcription system utilizing small aperture acoustical sensors Nov. 22, 2011
8060256 Apparatus, method, and medium for localizing moving robot and transmitter Nov. 15, 2011
8054712 Autonomous hydrophone position locating and target tracking system Nov. 8, 2011
8036065 Gunshot detection sensor with display Oct. 11, 2011
8009516 Underwater acoustic positioning system and method Aug. 30, 2011
7969822 System and method for extending GPS to divers and underwater vehicles Jun. 28, 2011
7955266 Ultrasonic contact transducer with multiple emitting elements and means of bringing these elements into contact Jun. 7, 2011
7916577 Method and system for recognizing location by using sound sources with different frequencies Mar. 29, 2011
7855935 Weapon fire location systems and methods involving mobile device and/or other features Dec. 21, 2010
7830750 Apparatus and method for calibrating an acoustic detection system Nov. 9, 2010
7822562 Removing air wave noise from electromagnetic survey data Oct. 26, 2010
7796471 Ultrasonic in-building positioning system based on phase difference array with ranging Sep. 14, 2010
7766298 Apparatus for positioning an image measuring platform Aug. 3, 2010
7764574 Positioning system using ultrasonic waves and method for operating the same Jul. 27, 2010
7751282 System and method for precision acoustic event detection Jul. 6, 2010
7710829 RSSI and ultrasonic based hybrid ranging technology May. 4, 2010
7688679 Gunshot detection sensor with display Mar. 30, 2010
7679997 Method and apparatus for estimating position of robot Mar. 16, 2010
7663976 Dynamic positioning of marine vessels Feb. 16, 2010
7649808 Distance measuring system and method utilizing infrared radiation and ultrasonic wave Jan. 19, 2010
7602329 Systems and methods of tracking and/or avoiding harm to certain devices or humans Oct. 13, 2009
7535798 Method, system, and medium for estimating location using ultrasonic waves May. 19, 2009
7515105 Method for mapping machine rooms and locating machines within machine rooms Apr. 7, 2009

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