Security element structure for documents, devices for checking documents with such security elements, method of the use thereof
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United States of America Patent
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Nov 7, 2006
Grant Date -
Jan 22, 2004
app pub date -
Jul 13, 2003
filing date -
Apr 25, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A structure of a security element for documents provided with a combination of differently reacting or responding security features and functional designs, including conductive, magnetic and diffractive ones, which render it difficult or impossible for counterfeiters to discover the functioning of the security element.
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