发明名称 |
SECURITY DOCUMENT AND VERIFICATION METHOD |
摘要 |
A security document, such as a banknote or a cheque, is provided with a perforation pattern (5) having holes (5a, 5b) with elongate cross section. When viewing the perforation pattern (5) from a direction that is non- perpendicular to the surface of the document, different holes will have different optical transmission, which can be verified by eye or electronically. Perforation patterns (5) of this type are hard to forge and easy to verify.
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申请公布号 |
CA2494592(A1) |
申请公布日期 |
2004.02.05 |
申请号 |
CA20022494592 |
申请日期 |
2002.07.25 |
申请人 |
ORELL FUSSLI SICHERHEITSDRUCK AG |
发明人 |
SCHERTENLEIB, BEAT ROLAND;VON FELLENBERG, IAN DANIEL |
分类号 |
B42D15/10;B42D15/00;G07D7/12;(IPC1-7):B42D15/00 |
主分类号 |
B42D15/10 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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