Method of checking the authenticity of a document with a co-laminated fabric layer inside

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United States of America Patent

PATENT NO 8619244
APP PUB NO 20110089676A1
SERIAL NO

12936662

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Abstract

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A method to test the authenticity of a document (1), such as an ID, a passport or a card, protected against forgery, wherein it comprises at least an inner co-laminated fabric layer (2) forming an optical watermark. This layer presents cuts, and so separated zones with fabric material and other zones without fabric material, forming well recognizable forms or pictures. Co-laminating one or a plurality of such fabric layers inside of the document body allows to create a multiple watermark having both surface relief and opacity effect, without adding any volume to the body of the document.

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Patent Owner(s)

Patent OwnerAddress
HID GLOBAL GMBH65396 WALLUF

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Griesbach, Andreas Erfurt, DE 2 31
Hecker, Hermann Berlin, DE 7 26

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