Inventor
MERKLE HANSJUERGEN
DE4 patents
Patents
4 patentsUS4765656AAug 23, 1988
Data carrier having an optical authenticity feature and methods for producing and testing said data carrier
GAO GES AUTOMATION ORG379 citations98
US4894110AJan 16, 1990
Identification card with a visible authenticity feature
GAO GES AUTOMATION ORG68 citations94
US4766026AAug 23, 1988
Identification card with a visible authenticity feature and a method of manufacturing said card
GAO GES AUTOMATION ORG95 citations94
US5304789AApr 19, 1994
Multilayer card-shaped data carrier and method for producing same
GAO GES AUTOMATION ORG132 citations93