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KELLER MARIO

DE3 patents

Top patents by PatentIndex Score

US8603615B2Dec 10, 2013

Security element

KELLER MARIO9 citations82

US8449969B2May 28, 2013

Security element for security papers and valuable documents

KELLER MARIO6 citations71

US8920663B2Dec 30, 2014

Production of a security element provided with colored micro-depressions

KELLER MARIO1 citations50