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:
Jul. 07, 1981
Filed:
Mar. 02, 1979
Applicant:
Inventors:
Takeo Sugiura, Tokorozawa, JP;
Keiji Miyajima, Chiba, JP;
Hideo Nagatomo, Saitama, JP;
Kiyoshi Masui, Saitama, JP;
Assignee:
Toppan Printing Co., Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61B / ;
U.S. Cl.
CPC ...
427-1 ; 283 / ;
Abstract
A document with a color pattern which is resistant to forgery by photo reproducing process, at least a portion of the color pattern comprising, a coloring material having a spectral reflection factor curve which is relatively high at a wavelength in at least one of the areas below 450 nm and about 650 nm, with respect to the rest of the curve. A method is also disclosed for avoiding reproduction of a document having colored areas using photo reproducing processes.