US PATENT SUBCLASS 348 / 811
.~.~.~.~ Beam position indicating

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.~.~.~.~ Beam position indicating {3}
812  DF  .~.~.~.~.~> Horizontal stripes
813  DF  .~.~.~.~.~> Photoelectric sensor
814  DF  .~.~.~.~.~> Secondary emission sensor

DEFINITION

Classification: 348/811

Beam position indicating:

(under subclass 810) Subject matter including an apparatus associated with the tube for indicating the instantaneous position of the electron beam.

SEE OR SEARCH CLASS

313, Electric Lamp and Discharge Devices,

471, for cathode-ray tube beam indexing elements.

315, Electric Lamp and Discharge Devices: Systems,

10+, for beam indexing circuits.