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:
Jul. 11, 2017
Filed:
Apr. 03, 2014
Giesecke & Devrient Gmbh, Munich, DE;
Elisabeth Paul, Raubling, DE;
Armin Stockli, Ittigen, CH;
GIESECKE & DEVRIENT GMBH, Munich, DE;
Abstract
Checking of security elements for value documents, which have a plurality of magnetic regions, includes at least a high-coercivity magnetic region having a high-coercivity magnetic material, a low-coercivity magnetic region having a low-coercivity magnetic material, and, where applicable, a combined magnetic region containing both the high-coercivity and the low-coercivity magnetic material. After magnetization of all magnetic materials or the magnetic regions formed therefrom in one direction with a first magnetic field region, only the low-coercivity magnetic material is remagnetized in another direction in a subsequent second magnetic field region. Magnetic signals of the magnetic regions are captured while the security element is still subjected to the second magnetic field region. On the basis of the signals all three types of magnetic region can be reliably distinguished.