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Class Information
Number: 367/101
Name: Communications, electrical: acoustic wave systems and devices > Echo systems > Distance or direction finding > Frequency modulation
Description: Subject matter in which the frequency of the transmitted acoustic waves is varied repetitively.










Sub-classes under this class:

Class Number Class Name Patents
367/102 Linear modulation (e.g., sawtooth) 30


Patents under this class:
1 2

Patent Number Title Of Patent Date Issued
8581778 Pulse compression system and method Nov. 12, 2013
8514982 Systems and methods for digitizing multiple channels in a receiver Aug. 20, 2013
8368553 Fracturing monitoring within a treatment well Feb. 5, 2013
8363511 Method and device for detection of surroundings Jan. 29, 2013
8194499 Ultrasonic underwater detector with voltage and envelope control Jun. 5, 2012
7805247 System and methods for well data compression Sep. 28, 2010
7800490 Electronic article surveillance system neural network minimizing false alarms and failures to deactivate Sep. 21, 2010
7729201 Method and apparatus for spread spectrum distance and velocity profile measurement Jun. 1, 2010
7635332 System and method of operating microfabricated ultrasonic transducers for harmonic imaging Dec. 22, 2009
7535797 High-resolution ultrasound displacement measurement apparatus and method May. 19, 2009
7348894 Method and apparatus for using a data telemetry system over multi-conductor wirelines Mar. 25, 2008
7239580 Noise adaptive sonar signal processor Jul. 3, 2007
6918875 Ultrasound measurement apparatus Jul. 19, 2005
6804168 Method for measuring distance Oct. 12, 2004
6703944 Technique for effectively maintaining a safe distance between a vehicle and an object Mar. 9, 2004
6563761 Apparatus and method of vehicle occupant sensing using multiple ultrasonic frequencies May. 13, 2003
6466515 Power-efficient sonar system employing a waveform and processing method for improved range resolution at high doppler sensitivity Oct. 15, 2002
6434085 Distance measuring systems altimeters and aircraft Aug. 13, 2002
6349073 Sonar system and method employing a power-efficient triplet-pair comb waveform Feb. 19, 2002
6140954 Radar device Oct. 31, 2000
6021090 Horizontal and vertical receiver-consistent deconvolution for an ocean bottom cable Feb. 1, 2000
5790474 Active sonar for under-ice conditions Aug. 4, 1998
5790068 AFC control switching circuit Aug. 4, 1998
5481504 Method and device for determining target speed and distance with frequency modulated pulses Jan. 2, 1996
5418758 Distance measurement system May. 23, 1995
5195059 Acoustic pipe length measuring apparatus Mar. 16, 1993
5173881 Vehicular proximity sensing system Dec. 22, 1992
5163026 Method for increasing the image rate of a sonar and sonar for the implementation of this method Nov. 10, 1992
5150335 Frequency interrupt continuous transmit active sonar transmission and signal processing technique Sep. 22, 1992
5111438 Method of acoustic processing for acoustic image classification May. 5, 1992
5077702 Doppler consistent hyperbolic frequency modulation Dec. 31, 1991
4998224 System for providing improved reverberation limited sonar performance Mar. 5, 1991
4960329 Chirp pulse echo ranging apparatus Oct. 2, 1990
4939698 Sonar system Jul. 3, 1990
4939699 Sonar system Jul. 3, 1990
4905208 Distance detecting apparatus Feb. 27, 1990
4895441 Method and apparatus for precision ranging Jan. 23, 1990
4884246 Method and apparatus for reflection mode imaging Nov. 28, 1989
4862427 Sonar system with area moving target indicator Aug. 29, 1989
4855961 Imaging apparatus Aug. 8, 1989
4697254 System and method for measuring ice thickness Sep. 29, 1987
4686659 Color sonar system for displaying echo signals from fish Aug. 11, 1987
4680740 Audio aid for the blind Jul. 14, 1987
4644511 Display system for fish sonar Feb. 17, 1987
4626855 Radar, sonar and similar systems Dec. 2, 1986
4613231 Laser range finder with non-linearity compensation Sep. 23, 1986
4598293 Radar or sonar detection system Jul. 1, 1986
4551825 Sonic ranging/detection system employing varied beamwidth Nov. 5, 1985
4506354 Ultrasonic position detecting system Mar. 19, 1985
4493064 Sonar System Jan. 8, 1985

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