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:
Jun. 06, 1995
Filed:
Dec. 22, 1993
Applicant:
Inventor:
Christopher J Dyball, Half Moon Bay, CA (US);
Assignee:
Drexler Technology Corporation, Mountain View, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B42D / ;
U.S. Cl.
CPC ...
283 86 ; 283 7793 ; 430140 ;
Abstract
An optical data identification card for an individual containing a photograph of the authorized user and a strip of optical contrast laser recording material with a laser-written macroscopic bi-level image of the authorized user to authenticate the photograph. The bi-level image is constructed by applying a dither matrix to a digital image file corresponding to the photograph. Each dark pixel consists of an array of high-density laser recorded spots or lines.