发明名称 |
SECURITY DEVICE |
摘要 |
A security device is disclosed having a region of piezochromic material and an integrated relief structure. The security device is arranged such that when a stress is generated in the piezochromic material and relief structure, an optical effect is generated in the piezochromic material. |
申请公布号 |
CA2758623(A1) |
申请公布日期 |
2010.10.21 |
申请号 |
CA20102758623 |
申请日期 |
2010.04.13 |
申请人 |
DE LA RUE INTERNATIONAL LIMITED |
发明人 |
WHITEMAN, ROBERT;EASTELL, CHRISTOPHER JOHN |
分类号 |
B42D15/00;B42D15/10;G02B1/00 |
主分类号 |
B42D15/00 |
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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