US PATENT SUBCLASS 73 / 35.13
.~.~.~ Piezoelectric

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

35.01  DF  ENGINE DETONATION (E.G., KNOCK) {4}
35.07  DF  .~ Specific type of detonation sensor {3}
35.12  DF  .~.~ Pressure {1}
35.13.~.~.~ Piezoelectric

DEFINITION

Classification: 73/35.13

Piezoelectric:

(under subclass 35.12) Subject matter wherein the sensing means comprises pressure responsive material which generates an electrical signal in response to the pressure fluctuation.

SEE OR SEARCH CLASS

310, Electrical Generator or Motor Structure,

338, for a pressure responsive piezoelectric detector, per se.