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Class Information
Number: 200/61.01
Name: Electricity: circuit makers and breakers > Special application > Sound wave responsive
Description: Circuit controllers which are operatively responsive to compressional impulses propogated in an elastic medium.

Patents under this class:

Patent Number Title Of Patent Date Issued
8484029 Device and method for booting handheld apparatus by sound detection Jul. 9, 2013
6008728 Water level alarm system Dec. 28, 1999
5149986 Electronic control button operated by sound absorption Sep. 22, 1992
H891 Automatic illumination switching device Feb. 5, 1991
4778009 Shock actuated switch for perforating gun assembly Oct. 18, 1988
4690242 Sound actuated switch Sep. 1, 1987
4230317 Sound actuated competitive game apparatus Oct. 28, 1980
4122445 Breakage detector having a conductive bent metallic leaf spring therein Oct. 24, 1978
3988680 Remote television control Oct. 26, 1976

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