US PATENT SUBCLASS 331 / 147
.~.~ Using discharge device with plural grids
Current as of:
June, 1999
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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.