US PATENT SUBCLASS 381 / 11
.~.~.~.~ Automatic switchover between mono and stereo modes

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  DF  .~ Broadcast or multiplex stereo {2}
3  DF  .~.~ FM final modulation {1}
4  DF  .~.~.~ AM subcarrier {7}
11.~.~.~.~ Automatic switchover between mono and stereo modes

DEFINITION

Classification: 381/11

Automatic switchover between mono and stereo modes:

(under subclass 4) Subject matter where a receiver is changed from a monaural receiver to a stereophonic receiver in response to the presence of a stereophonic signal at its input.