US PATENT SUBCLASS 381 / 18
.~.~ Pseudo quadrasonic

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

1  DF  BINAURAL AND STEREOPHONIC {8}
17  DF  .~ Pseudo stereophonic {1}
18.~.~ Pseudo quadrasonic

DEFINITION

Classification: 381/18

Pseudo quadrasonic:

(under subclass 17) Subject matter where the plurality of channels are four in number.