US PATENT SUBCLASS 340 / 825.73
.~.~ Plural frequencies

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

825  DF  SELECTIVE {23}
825.71  DF  .~ Frequency responsive actuation {2}
825.73.~.~ Plural frequencies {3}
825.74  DF  .~.~.~> Simultaneous
825.75  DF  .~.~.~> Permutation
825.76  DF  .~.~.~> Corresponding to distinct functions

DEFINITION

Classification: 340/825.73

Plural frequencies:

(under subclass 825.71) Subject matter transmitting plural control signals, each having a different frequency.