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Class Information
Number: 181/123
Name: Acoustics > Echo system
Description: Subject matter having means for sending out a sound wave and receiving said wave after a reflection being utilized to add some information to the original wave.

Sub-classes under this class:

Class Number Class Name Patents
181/124 Altitude or depth detection 42

Patents under this class:

Patent Number Title Of Patent Date Issued
8220584 Hybrid level measurement system Jul. 17, 2012
5363341 Level measuring device which can be assembled from components Nov. 8, 1994
4945520 Hydro-acoustic device for warning sea mammals Jul. 31, 1990
4943119 Height control device and method for a fixture for machining an object essentially defined by a single plane Jul. 24, 1990
4939703 Transducer baffle and sensor using same Jul. 3, 1990
4796726 Ultrasonic rangefinder Jan. 10, 1989
4750584 Distance measuring device Jun. 14, 1988
4739860 Ultrasonic rangefinder Apr. 26, 1988
4635240 Sonar navigation system Jan. 6, 1987
4326272 Electronic intruder detection system Apr. 20, 1982

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