US PATENT SUBCLASS 368 / 255
.~.~.~ With piezoelectric means

Current as of: June, 1999
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368 /   HD   HOROLOGY: TIME MEASURING SYSTEMS OR DEVICES

243  DF  SIGNALLING MEANS {6}
244  DF  .~ Time condition responsive (i.e., alarm) {10}
250  DF  .~.~ Electrical {8}
255.~.~.~ With piezoelectric means

DEFINITION

Classification: 368/255

With piezoelectric means:

(under subclass 250) Subject matter wherein the alarm means is at least partly comprised of material which when subjected to mechanical stress produces a voltage, or when subjected to a voltage undergoes mechanical stress.