US PATENT SUBCLASS 348 / 814
.~.~.~.~.~ Secondary emission sensor

Current as of: June, 1999
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348 /   HD   TELEVISION

739  DF  VIDEO DISPLAY {13}
805  DF  .~ Cathode-ray tube {5}
808  DF  .~.~ Color TV {3}
810  DF  .~.~.~ One electron beam supplying more than one color {2}
811  DF  .~.~.~.~ Beam position indicating {3}
814.~.~.~.~.~ Secondary emission sensor

DEFINITION

Classification: 348/814

Secondary emission sensor:

(under subclass 811) Subject matter including an apparatus for detecting varying quantities of a secondary emission produced by beam impact.