US PATENT SUBCLASS 381 / 3
.~.~ FM final modulation

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.~.~ FM final modulation {1}
4  DF  .~.~.~> AM subcarrier {7}

DEFINITION

Classification: 381/3

FM final modulation:

(under subclass 2) Subject matter where stereophonic signals are broadcast by means of a radio carrier wave which is only frequency modulated.

(1) Note. There may also be an amplitude modulated subcarrier.

SEE OR SEARCH CLASS

455, Telecommunications,

42+, 93, 110+, and 205+ for frequency modulated carrier wave communications in general.