The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 21, 1993
Filed:
Nov. 21, 1991
Applicant:
Inventors:
Assignee:
Nippondenso Co., Ltd., Kariya City, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
362 29 ; 362 30 ;
Abstract
A display board has a light transmitting substrate illuminated by a light source at the back side, a illuminance adjusting layer having a plurality of light reflective dots and formed on the surface at the front side of the substrate, and a colored light transmitting image layer formed on the illuminance adjusting layer. This display board is manufactured by forming a illuminance adjusting layer and image layer sequentially on the same side of the substrate.
Iwase, Teruhiko. (1993). Display board (U.S. Patent No. 5247429). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5247429
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