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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:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 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 |
| 5790068 |
AFC control switching circuit |
Aug. 4, 1998 |
| 5790474 |
Active sonar for under-ice conditions |
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 |
| 4458342 |
Diversified transmission multichannel detection system |
Jul. 3, 1984 |
| 4456982 |
Imaging system with multiple, simultaneous transmissions |
Jun. 26, 1984 |
| 4442513 |
Sonar transceiver system and method |
Apr. 10, 1984 |
| 4439845 |
Sonar system |
Mar. 27, 1984 |
| 4437619 |
Catenary controller |
Mar. 20, 1984 |
| 4434669 |
Apparatus for transmitting and receiving sound |
Mar. 6, 1984 |
| 4403314 |
Active detection system using simultaneous multiple transmissions |
Sep. 6, 1983 |
| 4376990 |
Device for transit time measurement and method |
Mar. 15, 1983 |
| 4364273 |
Apparatus for locating interfaces in media |
Dec. 21, 1982 |
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