US PATENT SUBCLASS 331 / 147
.~.~ Using discharge device with plural grids


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331 /   HD   OSCILLATORS

143  DF  RELAXATION OSCILLATORS {6}
146  DF  .~ Blocking oscillators {3}
147.~.~ Using discharge device with plural grids


DEFINITION

Classification: 331/147

(under subclass 146) Subject matter wherein the active element of the oscillator comprises a plural grid tube.

SEE OR SEARCH THIS CLASS, SUBCLASS:

72, for electron coupled oscillators utilizing plural grid tubes.

73+, for crystal oscillators utilizing plural grid tubes.

144, for multivibrators utilizing plural grid tubes.

152+, for relaxation oscillators in general utilizing plural grid tubes, e.g., phantastron type.