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:
Feb. 09, 2021
Filed:
Nov. 14, 2017
Applicant:
Morpho B.v., Haarlem, NL;
Inventors:
Jan Van Den Berg, Gouda, NL;
Erik Van Dijk, Haarlem, NL;
Assignee:
MORPHO B.V., Haarlem, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41M 3/14 (2006.01); B42D 25/29 (2014.01); B42D 25/23 (2014.01); B42D 25/435 (2014.01); G06F 21/30 (2013.01);
U.S. Cl.
CPC ...
B41M 3/148 (2013.01); B42D 25/23 (2014.10); B42D 25/29 (2014.10); B42D 25/435 (2014.10); G06F 21/30 (2013.01);
Abstract
Disclosed is a security document including an image layer with in a first image area an identification image. The document has in a second image area an authentication image that is composed of a first authentication image that is a positive version of the first image and a second authentication image that is a negative version of the first image. The authentication images can be observed at different angles and form a tilt image. Mutual comparison of the positive and negative tilt images and comparison with the identification image provides improved detection of unauthorized alterations.