US PATENT SUBCLASS 313 / 539
.~ Responsive to ultraviolet radiation

Current as of: June, 1999
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313 /   HD   ELECTRIC LAMP AND DISCHARGE DEVICES

523  DF  PHOTOSENSITIVE {12}
539.~ Responsive to ultraviolet radiation

DEFINITION

Classification: 313/539

Responsive to ultraviolet radiation:

(under subclass 523) Subject matter wherein the electrode is a photoemissive cathode responsive to ultraviolet radiation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

110+, for a lamp or discharge device with an optical device or a special ray transmissive envelope.

SEE OR SEARCH CLASS

250, Radiant Energy,

372+, for an invisible radiant energy responsive electric signalling system having ultraviolet responsive means.