US PATENT SUBCLASS 381 / 178
.~.~ Vibrating electrical contract

Current as of: June, 1999
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381 /   HD   ELECTRICAL AUDIO SIGNAL PROCESSING SYSTEMS AND DEVICES

150  DF  ELECTRO-ACOUSTIC AUDIO TRANSDUCER {18}
369  DF  .~ Microphone capsule only {10}
178.~.~ Vibrating electrical contract

DEFINITION

Classification: 381/178

Vibrating electrical contact:

(under subclass 168) Subject matter in which two elements have an area of intermittent electrical contact caused by oscillatory motion of an element in accordance with incident sound waves.