| 发明名称 |
The use of electrically conductive material as security feature |
| 摘要 |
The invention relates to a marking substance for security documents of the kind difficult to discern by counterfeiters. The preferred marking substance is polyethylene dioxythiophene polystyrene sulfonate and, more particularly, PEDT/PSS of the CPP105 formulation. |
| 申请公布号 |
EP1090187(B1) |
申请公布日期 |
2004.05.06 |
| 申请号 |
EP19990939917 |
申请日期 |
1999.06.15 |
| 申请人 |
WHD ELEKTRONISCHE PRUEFTECHNIK GMBH |
发明人 |
PUTTKAMMER, FRANK;PUTTKAMMER, MONIKA;ZSCHERPE, GUNTHER |
| 分类号 |
D21H21/48;B42D15/00;B42D15/10;D21F1/44;D21H21/40;D21H23/02;G06T1/00;G07D7/00;G07D7/02;G07D7/04;G07D7/12 |
主分类号 |
D21H21/48 |
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