US PATENT SUBCLASS 348 / 816
.~.~.~ With color specific optical device

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}
816.~.~.~ With color specific optical device {1}
817  DF  .~.~.~.~> Electrochromic device

DEFINITION

Classification: 348/816

With color specific optical device:

(under subclass 808) Subject matter including a device to modify an optical spectral characteristic of a color cathode-ray tube display.

(1) Note. For example, a color correcting filter is placed in front of the cathode-ray tube to improve the color balance.