A copyproof document includes a paper document substrate, a disc having a primarily holographic first face facing away from the substrate and a second face with permanent pressure sensitive adhesive engaging the substrate, and mechanical intertwining between the substrate and disc so that they are substantially...http://www.google.fr/patents/US6000727?utm_source=gb-gplus-shareBrevet US6000727 - Method and apparatus for creating secure documents
Method and apparatus for creating secure documents
