US PATENT SUBCLASS 327 / 522
.~.~ Gaseous tube

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

518  DF  WITH PARTICULAR CONTROL {3}
520  DF  .~ Plural active components included in a controlling circuit {2}
522.~.~ Gaseous tube

DEFINITION

Classification: 327/522

Gaseous tube:

(under subclass 520) Subject matter wherein the active components include an electronic tube into which a small amount of gas or vapor is introduced after the tube has been evacuated.

SEE OR SEARCH THIS CLASS, SUBCLASS:

601+, for miscellaneous circuits having gas tubes of particular structure.

SEE OR SEARCH CLASS

315, Electric Lamp and Discharge Devices: Systems, appropriate subclasses for system wherein a gaseous space discharge tube is the ultimate load or controls a space discharge load.