US PATENT SUBCLASS 327 / 406
.~.~ Electron tube

Current as of: June, 1999
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327 /   HD   MISCELLANEOUS ACTIVE ELECTRICAL NONLINEAR DEVICES, CIRCUITS, AND SYSTEMS

365  DF  GATING (I.E., SWITCHING INPUT TO OUTPUT) {12}
403  DF  .~ Parallel controlled paths {3}
406.~.~ Electron tube

DEFINITION

Classification: 327/406

Electron tube:

(under subclass 403) Subject matter wherein at least one path includes a vacuum tube or a gas filled tube, in which electrical currents flow between spaced electrodes, and in which the conduction of charged particles (e.g., electrons or ions), takes place between these electrodes.