Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
April 12, 2011
Patent Application Number
11615189
Date Filed
December 22, 2006
Patent Citations Received
Patent Primary Examiner
Patent abstract
An article bears an HVS-perceivable security pattern based on metamerism. The metamerism causes the security pattern to be perceived differently when viewed under two different light sources.
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