Security device

Details Security device Security device

2007-01-12

2009-10-06

Ben, Loha (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

C359S265000, C359S273000

Reexamination Certificate

active

07599109

ABSTRACT:
Embodiments of a security device utilizing electrochromic material are disclosed.

REFERENCES:
patent: 5668663 (1997-09-01), Varaprasad et al.
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patent: 6753995 (2004-06-01), Wang
patent: 6963437 (2005-11-01), Bauer et al.
patent: 7130101 (2006-10-01), Rukavina et al.
patent: 7317567 (2008-01-01), Campbell
patent: 7494231 (2009-02-01), Varaprasad et al.
patent: 2007/0139756 (2007-06-01), Agrawal et al.

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