Patent · US Active

Security element comprising magnetic materials having the same remanence and a different coercive field intensity

US8544893B2 · kind B2 · utility

5Cited by

2References

20Claims

0Family size

Assignee

GIESECKE & DEVRIENT GMBH · DE

Inventors

Jurgen Schutzmann · Brackenheim, DE
Lothar Schütt · Dachau, DE

Key dates

Filing date	Oct 11, 2005
Grant date	Oct 1, 2013
Priority date	—
Expiry date	Apr 23, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/24802
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

The invention relates to a security element for protecting documents of value, which has magnetic material. Furthermore, the invention relates to a document of value, a transfer material and method for producing such security elements and documents of value as well as a method and an apparatus for checking such a security element or document of value.According to the invention the security element has at least two magnetic materials, wherein the magnetic materials have different coercive field strengths and are applied onto and/or incorporated in the security element in such a manner that their remanence is equally high.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.