US PATENT SUBCLASS 340 / 393.3
.~.~ Pushbutton

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

384.1  DF  AUDIBLE INDICATION {11}
392.1  DF  .~ Percussion-type sound producer (e.g., signal chimes or bells) {15}
393.3.~.~ Pushbutton

DEFINITION

Classification: 340/393.3

Pushbutton:

(under subclass 392.1) Subject matter in which a manually actuated device must be depressed to operate the striking means for generating the audible sounds.