发明名称 |
Plastic identification card having forgery protection with respect to embossed information |
摘要 |
This invention relates to a plastic identification card with forgery protection with respect to embossed information. There is a problem with existing credit cards in that the forgers can change the embossed information. This problem is overcome by providing in registration with the embossed information a layer of chemicals reactive under the pressure of a change in the embossed information to release a colored dye.
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申请公布号 |
US4511908(A) |
申请公布日期 |
1985.04.16 |
申请号 |
US19840579013 |
申请日期 |
1984.02.10 |
申请人 |
BRITISH AMERICAN BANK NOTE INC. |
发明人 |
SMALL, EDWARD A. |
分类号 |
B42D15/10;B44F1/12;G07F7/08;(IPC1-7):B41M5/16 |
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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