US PATENT SUBCLASS 313 / 387
.~.~.~ Secondary electron emissive

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

364  DF  CATHODE RAY TUBE {11}
365  DF  .~ Image pickup tube {6}
384  DF  .~.~ Photoconductive {5}
387.~.~.~ Secondary electron emissive

DEFINITION

Classification: 313/387

(under subclass 384) Subject matter including an element which emits electrons in response to electrons reflected from the photoconductive element.

(1) Note. Included here are photomultipliers.