US PATENT SUBCLASS 340 / 329
.~.~ Intermittent

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

286.01  DF  SYSTEMS {24}
328  DF  .~ Audible signals (e.g., bell rings softly first and then loudly) {1}
329.~.~ Intermittent

DEFINITION

Classification: 340/329

(under subclass 328) Subject matter in which the audible signal operates intermittently.