US PATENT SUBCLASS 381 / 2
.~ Broadcast or multiplex stereo

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

1  DF  BINAURAL AND STEREOPHONIC {8}
2.~ Broadcast or multiplex stereo {2}
3  DF  .~.~> FM final modulation {1}
15  DF  .~.~> AM or both AM and angle final modulation {1}

DEFINITION

Classification: 381/2

Broadcast or multiplex stereo:

(under subclass 1) Subject matter for the broadcasting or transmission of two or more independent sound signals which are to be reproduced so as to create a sense of depth.

SEE OR SEARCH CLASS

360, Dynamic Magnetic Information Storage or Retrieval, for magnetically recording or reproducing stored stereophonic information.

369, Dynamic Information Storage or Retrieval,

85+, for recording or reproducing stored stereophonic information.

370, Multiplex Communications, appropriate subclasses for multiplex in general.

455, Telecommunications, appropriate subclasses for broadcast, nonstereo radio communications.