Birefringent marking

Details Birefringent marking Birefringent marking

2006-04-25

2006-04-25

Wu, Shean C. (Department: 1756)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

C349S117000, C349S171000, C349S175000, C349S181000, C252S299010

Reexamination Certificate

active

07033653

ABSTRACT:
The invention relates to a birefringent marking comprising a liquid crystal material. The invention further relates to method of providing such a birefringent marking and to the use of the birefringent marking for decorative or security applications.

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