US PATENT SUBCLASS 381 / 307
.~.~ Surround (i.e., front plus rear or side)

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

1  DF  BINAURAL AND STEREOPHONIC {8}
300  DF  .~ Stereo speaker arrangement {7}
307.~.~ Surround (i.e., front plus rear or side)

DEFINITION

Classification: 381/307

Surround (i.e., front plus rear or side):

(under subclass 300) Subject matter in which, in addition to having at least one transducer arranged forward of a listening position, at least one transducer is arranged laterally or to the back of the listening position.