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Class Information
Number: 181/400
Name: Acoustics > Wave coupling
Description: Elements or material for transforming sound wave energy from high to low pressure and vice versa.










Sub-classes under this class:

Class Number Class Name Patents
181/401 Earth 163
181/402 Liquid 47


Patents under this class:

Patent Number Title Of Patent Date Issued
6751162 Seismic sensor Jun. 15, 2004
6065562 System for imparting compressional and shear waves into the earth May. 23, 2000
5477506 In-flow acoustic sensor Dec. 19, 1995
5289436 Ultrasonic waveguide Feb. 22, 1994
4997705 Window for acoustic wave form and method for making Mar. 5, 1991
4920796 Tank level meter May. 1, 1990
4896535 Tank level meter Jan. 30, 1990
4856614 Process and device for seismic prospecting of a medium with induced waves created artificially in a bore-hole Aug. 15, 1989
4850450 Logging tool housing with acoustic delay Jul. 25, 1989
4787070 Coupler for ultrasonic transducer probe Nov. 22, 1988
4754443 Airgun having shaft-bearing-guided shuttle and capable of fast repitition self-firing Jun. 28, 1988
4580251 Ultrasonic distance sensor Apr. 1, 1986
4442512 Ultrasonic wave transmitting and receiving device for vehicles Apr. 10, 1984
4433398 Ultrasonic transducer Feb. 21, 1984
4228530 Mud level monitor Oct. 14, 1980
4195523 Ultrasonic thermometer Apr. 1, 1980
4149139 Ultrasonic transmission device Apr. 10, 1979
4101865 Sonic echo-sounder for the measurement of levels of substances Jul. 18, 1978
3946831 Acoustic transmitter Mar. 30, 1976











 
 
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