US PATENT SUBCLASS 332 / 142
.~.~.~.~ With separate modulator tube (e.g., reactance tube)

Current as of: June, 1999
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332 /   HD   MODULATORS

117  DF  FREQUENCY MODULATOR {6}
137  DF  .~ Including electron discharge device {1}
138  DF  .~.~ Particular oscillator circuit {2}
141  DF  .~.~.~ L-C oscillator type {1}
142.~.~.~.~ With separate modulator tube (e.g., reactance tube) {1}
143  DF  .~.~.~.~.~> Plural modulator tubes

DEFINITION

Classification: 332/142

With separate modulator tube (e.g., reactance tube):

(under subclass 141) Subject matter where an electron discharge device distinct from the L-C oscillator performs the actual modulation.