US PATENT SUBCLASS 362 / 339
.~.~ Prismatic type


Current as of: June, 1999
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362 /   HD   ILLUMINATION

317  DF  LIGHT MODIFIER {5}
326  DF  .~ Refractor {7}
339.~.~ Prismatic type {1}
340  DF  .~.~.~> Curved main surface


DEFINITION

Classification: 362/339

(under subclass 326) Subject matter wherein the intersection of one of the opposed surfaces with a transverse plane includes a plurality of regularly occurring and regularly shaped convexities each comprised of at least two straight lines joined at an angle.

SEE OR SEARCH THIS CLASS, SUBCLASS:

326, for refractors comprised of randomly occurring prismatic type refracting surfaces of the type, for example, formed by sand-blasting a glass surface.