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. |
申请公布号 |
GB2139951(A) |
申请公布日期 |
1984.11.21 |
申请号 |
GB19840004893 |
申请日期 |
1984.02.24 |
申请人 |
EDWARD ALEXANDER * SMALL |
发明人 |
EDWARD ALEXANDER * SMALL |
分类号 |
B42D15/10;B44F1/12;G07F7/08;(IPC1-7):42D15/02 |
主分类号 |
B42D15/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|