Security document

Coating processes – Fraud or tamper detecting

Reexamination Certificate

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Details

C427S336000, C427S369000, C427S547000, C427S550000, C427S553000

Reexamination Certificate

active

07449212

ABSTRACT:
A security document with a security element, wherein the security element includes at least partly a material that is optically changeable by an electric or magnetic field. In addition, a corresponding method for producing such a security document and a test method for testing such a security document are described.

REFERENCES:
patent: 4143103 (1979-03-01), Sheridon
patent: 0 721 176 (1996-07-01), None
patent: 1 024 470 (2000-08-01), None
patent: WO 00 36560 (2000-06-01), None
patent: WO 01 04832 (2001-01-01), None
patent: WO 01 88607 (2001-11-01), None

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