US PATENT SUBCLASS 340 / 825.71
.~ Frequency responsive actuation

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

825  DF  SELECTIVE {23}
825.71.~ Frequency responsive actuation {2}
825.72  DF  .~.~> Wireless link
825.73  DF  .~.~> Plural frequencies {3}

DEFINITION

Classification: 340/825.71

Frequency responsive actuation:

(under subclass 825) Subject matter wherein the control signal is a frequency variation in an alternating current.