(under subclass 546) Sign wherein the transparent portions are in the form of pipes or rods which transmit light rays from one point to another within the confines of their outer surface.
SEE OR SEARCH CLASS
250, Radiant Energy, for the combination of a light pipe and a photocell.
340, Communications: Electrical,
815.31, for visual signals involving light pipes.
362, Illumination,
806+, for decorative lights involving fiber optics. 385, Optical Waveguides, appropriate subclasses for light pipes or fiber optical elements, per se.
