US PATENT SUBCLASS 348 / 835
.~.~.~ Filters

Current as of: June, 1999
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348 /   HD   TELEVISION

739  DF  VIDEO DISPLAY {13}
805  DF  .~ Cathode-ray tube {5}
832  DF  .~.~ With optical element {3}
835.~.~.~ Filters

DEFINITION

Classification: 348/835

Filters:

(under subclass 832) Subject matter wherein the optical device includes a specific light wavelength absorption device.

SEE OR SEARCH CLASS

359, Optics: Systems (Including Communication) and Elements,

885+, for optical filters, per se.