Document with anti-forgery and anti-falsification means
作者： Walter Mantegazza
DOI:
关键词: Computer science 、 Communication 、 Representation (systemics) 、 Information retrieval 、 Counterfeit
摘要: The present invention relates to a document with counterfeit- and forgery-preventing means particularly for valued papers the like, which comprise sheet-like element having, on at least one face, graphic marking that is visible in reflected light. particularity of resides fact it comprises variation thickness said provides representation can be viewed against light complementary respect marking.
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