US PATENT SUBCLASS 313 / 495
.~ Vacuum-type tube


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

483  DF  WITH LUMINESCENT SOLID OR LIQUID MATERIAL {4}
495.~ Vacuum-type tube {1}
496  DF  .~.~> Phosphor on anode segments {1}


DEFINITION

Classification: 313/495

(under subclass 483) Subject matter including an evacuated envelope, a fluorescent or phosphorescent material within the envelope, an electron source, and an anode cooperating to bombard the fluorescent or phosphorescent material.