Identification of articles

Details Identification of articles Identification of articles

G - Physics

06

K

352/57

G06K 19/08 (2006.01) B42D 15/10 (2006.01) G02F 1/13 (2006.01) G06K 5/00 (2006.01) G06K 19/14 (2006.01) G07C 9/00 (2006.01) G07F 7/08 (2006.01)

Patent

CA 1180807

- 21 - ABSTRACT IDENTIFICATION OF ARTICLES An identifiable article, especially an identity document, has a marked element (8), eg. a photograph, covered by a mask (2) which is normally opaque but which, upon application of a suitab1e electric field, changes to an at least translucent state. Preferably, the mask (2) comprises a liquid-crystal layer (6) sandwiched between two plates (5, 7) of which at least one plate is at least translucent.

393706

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