US PATENT SUBCLASS 40 / 561
.~.~ Concentration of natural light

Current as of: June, 1999
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40 /   HD   CARD, PICTURE, OR SIGN EXHIBITING

541  DF  ILLUMINATED SIGN {13}
559  DF  .~ External light source {2}
561.~.~ Concentration of natural light {1}
562  DF  .~.~.~> With auxilliary light source

DEFINITION

Classification: 40/561

Concentration of natural light:

(under subclass 559) Sign wherein the source of illumination is the sun.