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Class Information
Number: 181/402
Name: Acoustics > Wave coupling > Liquid
Description: Elements or material wherein one of the media is a liquid.

Patents under this class:

Patent Number Title Of Patent Date Issued
6831876 Acoustic window Dec. 14, 2004
6751162 Seismic sensor Jun. 15, 2004
6584038 Device for receiving seismic waves and method for coupling them with a solid environment Jun. 24, 2003
6173803 High amplitude sound wave generator Jan. 16, 2001
5390155 Acoustic particle acceleration sensor and array of such sensors Feb. 14, 1995
5365491 Marine seismic bottom geophone coupling and anchor Nov. 15, 1994
5263371 Methods for temperature-compensated liquid height and leak detection measurements using quasi-static reference subsystem Nov. 23, 1993
5226320 Measuring device and process for determining the fill level in fluid containers, preferably for tank installations, with a sound waveguide Jul. 13, 1993
5130948 Method and apparatus for reducing acoustic emission from submerged submarines Jul. 14, 1992
5127266 Methods for liquid measurement using quasi-static reference subsystem Jul. 7, 1992
5128656 Level detecting method and its apparatus Jul. 7, 1992
5121340 Multi-level probe and system for measurement of physical conditions in liquid-containing tanks Jun. 9, 1992
5119676 Ultrasonic method and apparatus for determining water level in a closed vessel Jun. 9, 1992
5105394 Constrained diaphragm transducer Apr. 14, 1992
5076101 Liquid level measurement system for tanks Dec. 31, 1991
5036703 Method and apparatus for testing liquid fillings in tanks Aug. 6, 1991
4997705 Window for acoustic wave form and method for making Mar. 5, 1991
4920796 Tank level meter May. 1, 1990
4916674 Method and apparatus for improving the shallow water performance of a depth sounder Apr. 10, 1990
4896535 Tank level meter Jan. 30, 1990
4858204 Underwater signaling device Aug. 15, 1989
4853691 Method of and apparatus for the acoustic signalling of cases of drowning in swimming pools Aug. 1, 1989
4834210 Apparatus for generating seismic waves May. 30, 1989
4811815 Process and a device for hydrodynamic sound pulse generation in a liquid Mar. 14, 1989
4782910 Bi-polar bender transducer for logging tools Nov. 8, 1988
4780862 Borehole televiewer Oct. 25, 1988
4725990 Marine shear cable Feb. 16, 1988
4713800 Seismic air gun Dec. 15, 1987
4700803 Transducer forming compression and shear waves for use in acoustic well logging Oct. 20, 1987
4648479 Multiple-port, multiple-chamber, tuned air-powered subsea seismic source Mar. 10, 1987
4635747 Marine seismic vibrator having support structure including vibration isolators Jan. 13, 1987
4633970 Distributed marine seismic source Jan. 6, 1987
4633969 Signalling device Jan. 6, 1987
4557348 Tunable marine seismic source Dec. 10, 1985
4483411 Tunable marine seismic source Nov. 20, 1984
4463451 System for seismic digital data acquisition over water covered areas Jul. 31, 1984
4442916 Underwater shear wave vibrator coupling Apr. 17, 1984
4316271 Purging and expansion mechanism Feb. 16, 1982
4219096 Submergible marine seismic source Aug. 26, 1980
4207961 Exciting method for logging by S wave Jun. 17, 1980
4183009 Low frequency detection system Jan. 8, 1980
4016530 Broadband electroacoustic converter Apr. 5, 1977
4002221 Method of transmitting ultrasonic impulses to surface using transducer coupling agent Jan. 11, 1977
3997022 Device for generating acoustic waves by implosion Dec. 14, 1976
3984804 Acoustic and seismic troop movement detector Oct. 5, 1976
3981379 Device for emitting mechanical waves Sep. 21, 1976
3946831 Acoustic transmitter Mar. 30, 1976

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