US PATENT SUBCLASS 340 / 815.54
.~.~ Having optical means in viewing path

Current as of: June, 1999
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340 /   HD   COMMUNICATIONS: ELECTRICAL

815.4  DF  VISUAL INDICATION {18}
815.53  DF  .~ Lighted alphanumeric or character indicator matrix {1}
815.54.~.~ Having optical means in viewing path

DEFINITION

Classification: 340/815.54

Having optical means in viewing path:

(under subclass 815.53) Subject matter having a light modifying means between the light source and the matrix for affecting the presentation of the indicative elements.

(1) Note. The optical means includes, for example, a lens, mask, grating, mirror, light guides, etc.

SEE OR SEARCH CLASS

345, Computer Graphics Processing, Operator Interface Processing, and Selective Visual Display Systems,

32, for optical means interposed in viewing path (e.g., filters, lens) in a generic selective display system.

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

602+, for glare or unwanted light reduction with mirror, subclasses 515+ for signal reflector, and subclasses 642+ for lens, per se.