(under subclass 433) Display device wherein the rotating disk(s) acts as a light polarizer, thus masking or filtering light emanating from a specific angle.
SEE OR SEARCH THIS CLASS, SUBCLASS:
548, for illuminated signs which employ polarizing means.
SEE OR SEARCH CLASS
359, Optics: Systems (Including Communication) and Elements,
483+, for nonmodulating polarizing devices.
362, Illumination, 35, for revolving illumination device, per se.