US PATENT SUBCLASS 381 / 109
.~ With manual volume control

Current as of: June, 1999
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381 /   HD   ELECTRICAL AUDIO SIGNAL PROCESSING SYSTEMS AND DEVICES

104  DF  INCLUDING AMPLITUDE OR VOLUME CONTROL {4}
109.~ With manual volume control

DEFINITION

Classification: 381/109

With manual volume control:

(under subclass 104) Subject matter wherein volume is controlled in accordance with the position of a device which is adjusted by hand.