发明授权
US5176405A Security document having a security element embedded therein with
visually and machine-testable marks
失效
具有可视化和机器可测试标记嵌入的安全元件的安全文件
- 专利标题： Security document having a security element embedded therein with visually and machine-testable marks
- 专利标题（中）： 具有可视化和机器可测试标记嵌入的安全元件的安全文件
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申请号： US659335申请日： 1991-03-07
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公开(公告)号： US5176405A公开(公告)日： 1993-01-05
- 发明人: Wittich Kaule , Michael Bohm
- 申请人： Wittich Kaule , Michael Bohm
- 申请人地址： DEX
- 专利权人： GAO, Gesellschaft fur Automation und Organisation mbH
- 当前专利权人： GAO, Gesellschaft fur Automation und Organisation mbH
- 当前专利权人地址： DEX
- 优先权： DEX3915638 19890512
- 主分类号： B42D15/00
- IPC分类号： B42D15/00 ; B42D25/29 ; B42D25/355 ; D21H21/44 ; G06K19/067 ; G07D7/12 ; G07D7/20 ; G07F7/08
摘要：
In a security document having an embedded security element in the form of a transparent thread with electrically conductive material in at least two layers, at least one layer is transparent or partly transparent at least in certain areas. The partly transparent layer interacts with marks located on the thread in such a way that the marks are largely concealed in incident light but are recognizable visually in transmitted light.
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