US PATENT SUBCLASS 327 / 599
.~.~ Vacuum tube type

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

524  DF  SPECIFIC IDENTIFIABLE DEVICE, CIRCUIT, OR SYSTEM {22}
598  DF  .~ With particular tube structure {2}
599.~.~ Vacuum tube type {1}
600  DF  .~.~.~> Beam tube structure

DEFINITION

Classification: 327/599

Vacuum tube type:

(under subclass 598) Subject matter wherein a particular circuit includes a space discharge device which consists of electrodes in an evacuated tube.