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:
Mar. 26, 1991
Filed:
Oct. 04, 1988
Applicant:
Inventor:
Jean-Claude Millet, Bourg les Valence, FR;
Assignee:
Image S.A., Bourg les Valence, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K / ;
U.S. Cl.
CPC ...
382 11 ; 283 73 ; 283 81 ; 380 28 ; 382-1 ;
Abstract
This method consists in introducing a programmed defect at the writing level; the defect will be detected at the reading level by means of a key corresponding to the writing control algorithm which is known only to the user.