Security element

Details Security element Security element

2006-05-30

2006-05-30

Assaf, Fayez G. (Department: 2872)

Optical: systems and elements

Holographic system or element

Authentication

C359S007000, C359S900000, C283S094000

Reexamination Certificate

active

07054043

ABSTRACT:
The invention relates to an object of value with a security element having at least a first and a second liquid-crystalline material, the first material having thermochromic properties and the second material an optically variable effect.

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patent: WO 00/54985 (2000-09-01), None
patent: WO 01/16426 (2001-03-01), None

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