US PATENT SUBCLASS 340 / 328
.~ Audible signals (e.g., bell rings softly first and then loudly)

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

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

DEFINITION

Classification: 340/328

(under subclass 286.01) Subject matter having an audible signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

384+, for audible signals, per se.