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  • US 3,288,990 A
  • Filed: 09/25/1964
  • Issued: 11/29/1966
  • Est. Priority Date: 09/25/1964
  • Status: Expired due to Term
First Claim
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1. A LIGHTING PANEL COMPRISING A TRANSPARENT PRISMATIC PLATE WITH ONE PRISMATIC SURFACE AND AN OPPOSITE SMOOTH PLANAR SURFACE AND A DIFFUSION FILM OVERLYING SAID PLANAR SURFACE, BONDED THERETO IN SPACED BONDED AREAS AND SPACED THEREFROM INTERMEDIATE SAID BOUNDED AREAS, SAID BONDED AREAS CONSTITUTING A MINOR PART OF THE TOTAL AREA OF THE PLATE OVERLAIN BY SAID FILM.

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