发明名称 |
Invisible, machine-detectable security marking, production of the security marking, and security system comprising this security marking |
摘要 |
The invention relates to a security marking whose level of proof against forgery is greater than that of known security markings, comprising liquid-crystalline material with chiral phase, wherein the security marking is imperceptible to the eye and the properties of the liquid-crystalline material with chiral phase can be detected with the aid of detection systems.
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申请公布号 |
US7401817(B2) |
申请公布日期 |
2008.07.22 |
申请号 |
US20020299239 |
申请日期 |
2002.11.19 |
申请人 |
SICPA HOLDING S.A. |
发明人 |
MUELLER-REES CHRISTOPH;KUEPFER JUERGEN;LEIGEBER HORST;SCHWALB GEORG |
分类号 |
B42D15/10;G06K9/00;B41M3/14;B42D15/00;B44F1/12;G02B5/30;G02F1/13;G03G21/04;G06K7/12;G06K19/06;G07D7/12 |
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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