US PATENT SUBCLASS 313 / 379
.~.~.~ 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}
373  DF  .~.~ With photoemissive cathode {8}
379.~.~.~ Secondary electron emissive

DEFINITION

Classification: 313/379

(under subclass 373) Subject matter including an electron multiplier responding to electrons returning from the photo-emissive cathode.

SEE OR SEARCH THIS CLASS, SUBCLASS:

377, for an electron multiplier receiving electrons returning from a target.