US PATENT SUBCLASS 340 / 384.72
.~.~ Plural generators

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

384.1  DF  AUDIBLE INDICATION {11}
384.7  DF  .~ Electronic {3}
384.72.~.~ Plural generators

DEFINITION

Classification: 340/384.72

Plural generators:

(under subclass 384.7) Subject matter comprising a plurality of oscillators for generating audio frequency signals at different operating frequencies or means for producing multi-tone audible sounds.