US PATENT SUBCLASS 200 / 61.01
.~ Sound wave responsive

Current as of: June, 1999
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200 /   HD   ELECTRICITY: CIRCUIT MAKERS AND BREAKERS

52 R  DF  SPECIAL APPLICATION {25}
61.01.~ Sound wave responsive

DEFINITION

Classification: 200/61.01

(under subclass 52) Circuit controllers which are operatively responsive to compressional impulses propogated in an elastic medium.