| 发明名称 |
Support provided with a machine detectable copying security element |
| 摘要 |
A support provided with a machine-detectable security element, particularly a copying-security element. The security element comprises a first image perceptible to the human visual system, said first image incorporating a second image that is substantially imperceptible to the human visual system.
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| 申请公布号 |
US5374976(A) |
申请公布日期 |
1994.12.20 |
| 申请号 |
US19930105783 |
申请日期 |
1993.08.12 |
| 申请人 |
JOH. ENSCHEDE EN ZONEN GRAFISCHE INRICHTING B.V. |
发明人 |
SPANNENBURG, SIJBRAND |
| 分类号 |
G03G21/00;B42D15/00;G03G21/04;G06T1/00;H04N1/00;H04N1/32;H04N1/387;H04N1/40;(IPC1-7):G03G21/00 |
主分类号 |
G03G21/00 |
| 代理机构 |
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代理人 |
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| 地址 |
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