US PATENT SUBCLASS 313 / 530
.~.~ With photocathode on envelope

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

523  DF  PHOTOSENSITIVE {12}
525  DF  .~ Having phosphor screen {5}
530.~.~ With photocathode on envelope

DEFINITION

Classification: 313/530

With photocathode on envelope:

(under subclass 525) Subject matter wherein the photoemissive cathode is on the envelope wall.