Patent · US Expired

Safety document

US6491324B1 · kind B1 · utility

33Cited by

24References

41Claims

0Family size

Assignee

GIESECKE & DEVRIENT GMBH · DE

Inventors

Christian Schmitz · Wilrijk, BE
Theo Burchard · Tegernsee, DE

Key dates

Filing date	Apr 10, 2000
Grant date	Dec 10, 2002
Priority date	—
Expiry date	Apr 10, 2020

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/24835
WIPO fieldOther consumer goods
WIPO sectorOther fields

Abstract

The invention relates to a security element for protecting objects which has at least one mechanically testable magnetic layer and at least one further layer consisting of a layer semitransparent in the visual spectral region. The semitransparent layer is additionally disposed over the magnetic layer so as to cover the magnetic layer. The invention further relates to a security document with such a security element.

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