US PATENT SUBCLASS 332 / 131
.~.~ With electron discharge device

Current as of: June, 1999
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332 /   HD   MODULATORS

117  DF  FREQUENCY MODULATOR {6}
129  DF  .~ Including microwave or distributed parameter structure {2}
131.~.~ With electron discharge device {3}
132  DF  .~.~.~> Magnetron type
133  DF  .~.~.~> Klystron type
134  DF  .~.~.~> Travelling wave type

DEFINITION

Classification: 332/131

With electron discharge device:

(under subclass 129) Subject matter combined with a device which has electrical current flow between two spaced electrodes in a gas, vapor or vacuum.

(1) Note. This might include, for example, vacuum or gas tubes such as diodes, triodes or pentodes.

(2) Note. Additional control electrodes may be present.