US PATENT SUBCLASS 340 / 692
.~.~ Sound reproducer

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

500  DF  CONDITION RESPONSIVE INDICATING SYSTEM {6}
691.1  DF  .~ Specified indicator structure {7}
692.~.~ Sound reproducer

DEFINITION

Classification: 340/692

Sound reproducer:

(under subclass 691.1) Subject matter where the humanly perceptible signal is an audible message communicated via means such as a loudspeaker.

SEE OR SEARCH CLASS

381, Electrical Audio Signal Processing and Systems, appropriate subclasses for audio systems in general.