VHP VEILIGHEIDSPAPIERFABRIEK UGCHELEN B.V.
VHP VEILIGHEIDSPAPIERFABRIEK UGCHELEN B.V. Patent applications | ||
Patent application number | Title | Published |
---|---|---|
20110290435 | Method For Producing A Watermark Element, Watermark Element, And Also Applications - According to one aspect, the invention relates to a method for producing a watermark element ( | 12-01-2011 |
20080274474 | Authentication Method and System for Authenticating Security Documents, Security Document and Security Element - An authentication system for authenticating security documents contains at least an enzyme and a substrate and any co-enzymes and/or co-factors needed, capable of an enzymatic conversion. This conversion leads to a detectable change. The security-document contains at least one of the enzyme and the substrate. According to the invention the genetic information for the enzyme is derived from an extremophilic micro-organism. A security document for use in the authentication system and method is also described. | 11-06-2008 |