Patent · US Expired

Security system, particularly for valuable documents

US7315407B2 · kind B2 · utility

4Cited by

5References

7Claims

0Family size

Assignee

GIESECKE & DEVRIENT GMBH · DE

Inventors

Irina Menz · Diedorf, DE
Gunther Dausmann · Erding, DE
Benedikt Ahlers · Berlin, DE
Arnim Franz-Burgholz · Berlin, DE

Key dates

Filing date	Aug 17, 2001
Grant date	Jan 1, 2008
Priority date	—
Expiry date	Aug 17, 2021

Classification

Technology area (CPC G)Physics
CPC primaryG07D7/207
WIPO fieldControl
WIPO sectorInstruments

Abstract

The invention relates to a security system especially for security documents, wherein a security element is provided in a carrier plane, that under incident light holographically reconstructs a pattern outside the carrier plane, in which concealed information is stored and having a flat transparent verification element which on flat contact with the security element makes the information stored therein visible. The invention further relates to a security element and a verification element for use in the security system and a security document fitted with the security system. The invention additionally relates to an apparatus and a method for reading out the concealed information which is stored holographically in the pattern reconstructed on the security element under incident light.

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