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:
Dec. 31, 2013
Filed:
Apr. 06, 2009
Applicants:
Hermann Hecker, Berlin, DE;
Andreas Griesbach, Erfurt, DE;
Inventors:
Hermann Hecker, Berlin, DE;
Andreas Griesbach, Erfurt, DE;
Assignee:
HID Global GmbH, , DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06K 9/74 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method to test the authenticity of a document (), such as an ID, a passport or a card, protected against forgery, wherein it comprises at least an inner co-laminated fabric layer () forming an optical watermark. This layer presents cuts, and so separated zones with fabric material and other zones without fabric material, forming well recognizable forms or pictures. Co-laminating one or a plurality of such fabric layers inside of the document body allows to create a multiple watermark having both surface relief and opacity effect, without adding any volume to the body of the document.