US PATENT SUBCLASS 327 / 340
.~.~ Single vacuum tube


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

334  DF  SPECIFIC INPUT TO OUTPUT FUNCTION {9}
336  DF  .~ By integrating {9}
340.~.~ Single vacuum tube


DEFINITION

Classification: 327/340

Single vacuum tube:

(under subclass 336) Subject matter including only one device with sealed envelope which controls the flow of electrons between spaced electrodes through a fully or partially evacuated space.