US PATENT SUBCLASS 362 / 308
.~.~.~ Refractor

Current as of: June, 1999
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362 /   HD   ILLUMINATION

257  DF  LIGHT SOURCE (OR SUPPORT THEREFOR) AND MODIFIER {18}
296  DF  .~ Including reflector {4}
307  DF  .~.~ With or including translucent or transparent modifier {1}
308.~.~.~ Refractor {1}
309  DF  .~.~.~.~> With complex surface

DEFINITION

Classification: 362/308

(under subclass 307) Subject matter wherein the light pervious material is transparent and has surfaces arranged relative to at least some of the incident light from the source such that the angle of entry of the light with respect to the light-facing surface is different from the angle of the emergent light with respect to the surface from which it emerges.