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:
Jan. 29, 1991
Filed:
Oct. 18, 1989
Applicant:
Inventor:
Werner Preuss, Leverkusen, DE;
Assignee:
Agfa-Gevaert Aktiengessellschaft, Leverkusen, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G09F / ;
U.S. Cl.
CPC ...
362351 ; 362812 ; 40564 ;
Abstract
To produce outdoor advertising installations which are equipped to be illuminated and have different areas appearing, respectively, dark and light by daylight, with the brightness of the different areas being reversed by night under the influence of artificial light acting from the back, areas which appear bright by daylight on the outermost plate (information plate) are back printed with a bright covering and behind that with a dark covering and areas which appear dark by daylight are back printed dark with a regular pattern of lines or points.