US PATENT SUBCLASS 332 / 169
.~.~ Including electron discharge device

Current as of: June, 1999
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332 /   HD   MODULATORS

149  DF  AMPLITUDE MODULATOR {14}
167  DF  .~ Suppressed carrier double sideband type {2}
169.~.~ Including electron discharge device

DEFINITION

Classification: 332/169

Including electron discharge device:

(under subclass 167) Subject matter utilizing 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.