US PATENT SUBCLASS 362 / 292
.~.~ Including nonparallel modifying surfaces

Current as of: June, 1999
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362 /   HD   ILLUMINATION

257  DF  LIGHT SOURCE (OR SUPPORT THEREFOR) AND MODIFIER {18}
290  DF  .~ Louvered or grid type modifier {2}
292.~.~ Including nonparallel modifying surfaces

DEFINITION

Classification: 362/292

(under subclass 290) Subject matter wherein at least two of the surfaces exposed to light from the light source converge towards each other.