US PATENT SUBCLASS 331 / 38
.~ Plural beating

Current as of: June, 1999
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331 /   HD   OSCILLATORS

37  DF  BEAT FREQUENCY {4}
38.~ Plural beating {1}
39  DF  .~.~> Single channel

DEFINITION

Classification: 331/38

(under subclass 37) Subject matter wherein the system includes at least two signal combining means (i.e., mixers or modulators).

SEE OR SEARCH THIS CLASS, SUBCLASS:

22, for automatic frequency stabilized oscillators with reference oscillator or source and including plural heterodyne stages in the frequency control circuit.

31, for automatic frequency stabilized oscillators with plural heterodyne stages in the frequency control circuit.

SEE OR SEARCH CLASS

455, Telecommunications, 314+, for radio receivers that may have plural heterodyning stages.