US PATENT SUBCLASS 378 / 122
.~.~ Field emisssion or cold cathode

Current as of: June, 1999
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378 /   HD   X-RAY OR GAMMA RAY SYSTEMS OR DEVICES

119  DF  SOURCE {3}
121  DF  .~ Electron tube {12}
122.~.~ Field emisssion or cold cathode

DEFINITION

Classification: 378/122

Field emission or cold cathode:

(under subclass 121) Subject matter wherein electrons are ejected by a cathode upon the application of an intense potential gradient between the cathode and anode.

SEE OR SEARCH CLASS

313, Electric Lamp and Discharge Devices,

309, or discharge devices having a multipointed or serrated edge electrode and subclass 336 for point source cathodes.