US PATENT SUBCLASS 381 / 9
.~.~.~.~.~ Four or more diodes

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}
7  DF  .~.~.~.~ Switch-type detector or modulator {2}
9.~.~.~.~.~ Four or more diodes

DEFINITION

Classification: 381/9

Four or more diodes:

(under subclass 7) Subject matter in which the detector or demodulator contains at least four diodes.