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Class Information
Number: 367/92
Name: Communications, electrical: acoustic wave systems and devices > Echo systems > Parametric sonar
Description: Subject matter which produces sum and difference frequencies by the nonlinear mixing of compressional waves within the propagating medium.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7319639 |
Acoustic concealed item detector |
Jan. 15, 2008 |
| 7289391 |
Narrowband phase difference measurement technique for sonar applications |
Oct. 30, 2007 |
| 7196970 |
Ultrasonic ranging system and method thereof in air by using parametric array |
Mar. 27, 2007 |
| 7146011 |
Steering of directional sound beams |
Dec. 5, 2006 |
| 6856918 |
Method to characterize material using mathematical propagation models and ultrasonic signal |
Feb. 15, 2005 |
| 6704247 |
High efficiency parametric sonar |
Mar. 9, 2004 |
| 6661739 |
Filigree electrode pattern apparatus for steering parametric mode acoustic beams |
Dec. 9, 2003 |
| 6590832 |
Vibrator and method of exploring a material medium by means of very low-frequency elastic vibrations |
Jul. 8, 2003 |
| 5903516 |
Acoustic force generator for detection, imaging and information transmission using the beat signal of multiple intersecting sonic beams |
May. 11, 1999 |
| 5790474 |
Active sonar for under-ice conditions |
Aug. 4, 1998 |
| 5719823 |
Ground penetrating sonar |
Feb. 17, 1998 |
| 5305286 |
Bistatic/monostatic sonar fence |
Apr. 19, 1994 |
| 5237541 |
Platform carried bistatic sonar |
Aug. 17, 1993 |
| 5235558 |
Choke point bistatic sonar |
Aug. 10, 1993 |
| 4924449 |
Acoustic sub-surface interrogator |
May. 8, 1990 |
| 4872146 |
Method and apparatus for simulating phase coherent signal reflections in media containing randomly distributed targets |
Oct. 3, 1989 |
| 4712201 |
Acoustic self-guidance systems for submarine vehicles |
Dec. 8, 1987 |
| 4703462 |
Virtually steerable parametric acoustic array |
Oct. 27, 1987 |
| 4697254 |
System and method for measuring ice thickness |
Sep. 29, 1987 |
| 4603408 |
Synthesis of arbitrary broadband signals for a parametric array |
Jul. 29, 1986 |
| 4596007 |
Interferometric sonar in non-linear acoustics |
Jun. 17, 1986 |
| 4493064 |
Sonar System |
Jan. 8, 1985 |
| 4471473 |
Direction finding circuit arrangement |
Sep. 11, 1984 |
| 4460066 |
Crime prevention apparatus for elevators |
Jul. 17, 1984 |
| 4400804 |
Driver for high power sonar systems |
Aug. 23, 1983 |
| 4373143 |
Parametric dual mode transducer |
Feb. 8, 1983 |
| 4349898 |
Sonic weapon system |
Sep. 14, 1982 |
| 4320474 |
Saturation limited parametric sonar source |
Mar. 16, 1982 |
| 4308599 |
Echo sounder transmitting radiant energy at two frequencies |
Dec. 29, 1981 |
| 4296482 |
Parametric array Doppler sonar apparatus |
Oct. 20, 1981 |
| 4270191 |
Doppler current meter for use at great depths |
May. 26, 1981 |
| 4265122 |
Nondestructive testing apparatus and method utilizing time-domain ramp signals |
May. 5, 1981 |
| 4255797 |
Sonic attenuation system |
Mar. 10, 1981 |
| 4253166 |
Target location systems |
Feb. 24, 1981 |
| 4216537 |
Sonar for the topographic representation of a submerged surface and underlying strata |
Aug. 5, 1980 |
| 4213195 |
Sonic direction system |
Jul. 15, 1980 |
| 4207620 |
Oceanographic mapping system |
Jun. 10, 1980 |
| 4190818 |
Digital beamsteering for a parametric scanning sonar system |
Feb. 26, 1980 |
| 4135142 |
Non-linear acoustic transducer |
Jan. 16, 1979 |
| 4075599 |
Undersea geophysical exploration |
Feb. 21, 1978 |
| 4050056 |
Electroacoustic transducer design for eliminating phantom target errors in sound ranging systems |
Sep. 20, 1977 |
| 4012950 |
Method of and apparatus for acoustic imaging |
Mar. 22, 1977 |
| 4007437 |
Acoustic foghorn for directional signaling |
Feb. 8, 1977 |
| 3974476 |
Highly-directional acoustic source for use in borehole surveys |
Aug. 10, 1976 |
| 3964013 |
Cavitating parametric underwater acoustic source |
Jun. 15, 1976 |
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