Patent · US Expired

Data carrier having an optically variable element and methods for producing it

US6337752B1 · kind B1 · utility

55Cited by

50References

12Claims

0Family size

Assignee

GAO Gesellschaft für Automation und organisation mbH · DE

Inventors

Christoph Heckenkamp · Munich, DE
Wittich Kaule · Grafing, DE
Gerhard Stenzel · Germering, DE

Key dates

Filing date	Feb 13, 1998
Grant date	Jan 8, 2002
Priority date	—
Expiry date	Feb 13, 2018

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S283/901
WIPO fieldOptics
WIPO sectorInstruments

Abstract

The invention relates to a system comprising a series of data carriers, in particular identity cards, papers of value or the like, whereby the data carriers belonging to the system exhibit diffraction structures containing standard information and parts of the series are changed by additional measures in the area of the diffraction structures or combined with other elements and they differ from the rest of the series in optically recognizable fashion, whereby the change in the diffraction structures and/or the combination with other elements convey an esthetic overall impression and the change and/or combination with the other elements cannot be undone without destruction of the diffraction structures.

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