US PATENT SUBCLASS 348 / 805
.~ Cathode-ray tube

Current as of: June, 1999
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348 /   HD   TELEVISION

739  DF  VIDEO DISPLAY {13}
805.~ Cathode-ray tube {5}
806  DF  .~.~> With distortion, alignment or focus {1}
808  DF  .~.~> Color TV {3}
818  DF  .~.~> Protective device {3}
825  DF  .~.~> Support {3}
832  DF  .~.~> With optical element {3}

DEFINITION

Classification: 348/805

Cathode-ray tube:

(under subclass 739) Subject matter including a device in which a focused beam of electrons is employed to impart visual information.

(1) Note. A cathode-ray tube in general is a vacuum tube in which its electron beam is focused to a small cross section on a luminescent screen and is varied in position and intensity to produce a visible pattern.

SEE OR SEARCH CLASS

315, Electric Lamp and Discharge Devices: Systems,

10+, for cathode-ray tube circuits.