(under subclass 23) Subject matter wherein the illuminating structure includes (1) an object made of light transmitting material with a relatively narrow surface or side disposed adjacent a light source; or (2) a transparent, relatively elongated structure which transmits light rays from one point to another within the confines of its outer surface or surfaces by internal reflections or nodal transmission.
(1) Note. This and indented subclass include, for example, the combination of a relatively thin light transmitting object and a light source located in an aperture extending through its major surfaces or embedded between said major surfaces.
SEE OR SEARCH THIS CLASS, SUBCLASS:
31, for edge lighted panels without a dial or scale.
32, for illumination means which includes light fibers, rods or pipes without a dial or scale.
SEE OR SEARCH CLASS
40, Card, Picture, or Sign Exhibiting, 423, and 541+ for edge illuminated signs and including fiber optics.
116, Signals and Indicators,
200, 244, and 286+ for indicators using light guides.
340, Communications: Electrical,
815.4+, particularly subclasses 815.42+ for light piping used in electrically controlled visual signal indicators.
385, Optical Waveguides, appropriate subclasses for light transmitting fibers, rods, or pipes, per se.
