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. 09, 1990
Filed:
Feb. 19, 1981
Applicant:
Inventors:
William M Webster, Jr, Princeton, NJ (US);
John P Russell, Pennington, NJ (US);
Assignee:
General Electric Company, Schenectady, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
G02B / ; B44F / ;
U.S. Cl.
CPC ...
35016223 ; 283 91 ; 427-7 ; 428916 ;
Abstract
An improved authenticating device comprises a substrate bonded to the sheet material, the substrate having a reflective diffractive structure formed as a relief pattern on a viewable surface thereof, and a transparent material covering the structure. Specified grating parameters of the diffractive structure, obtainable at low cost, result in peculiar, but easily discernable, optical color properties that cannot be copied by color copying machines.
Webster, Jr, William. (1990). Sheet-material authenticated item with reflective-diffractive (U.S. Patent No. 4892385). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4892385
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile