Security document with an optical security area
A security document, such as a banknote, includes an optical security area having a first periodic optical structure and a security sign provided on the security area and configured to circumscribe a second periodic optical structure which is disposed in offset relationship to the first periodic opt...
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Main Authors | , |
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Format | Patent |
Language | English |
Published |
07.02.2006
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Subjects | |
Online Access | Get full text |
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