1
Wittich Kaule: Security document and a method for producing it. GAO Gesellschaft fur Automation und Organisation mbH, Bacon & Thomas, May 14, 1996: US05516153 (75 worldwide citation)

A security element for use in a security document such as a bank note, identity card or the like includes at least a partial metallic coating on a substrate and wherein the metallic coating includes recesses in the forms of characters or patterns that are visually recognizable at least in transmitte ...


2
Kaule Wittich: Document de securite et methode de production, A security document and a method for producing it. Gao Gesellschaft Fur Automation Und Organisation Mbh, RICHES MCKENZIE & HERBERT, April 3, 2001: CA2059486

A security document is described, in particular a banknote, identity card or the like, having a securityelement consisting of a film with a magnetic coating. The coating comprises licht soft-magnetic pigments,so that the colour of the coating is not influencedby the pigment. The pigment can be appli ...