发明名称 |
SECURITY DISPLAY DEVICES, THEIR PRODUCTION AND USE |
摘要 |
Security documents often incorporate security devices to prevent or hinder counterfeiters. Disclosed herein are security devices that include a fluid or fluids within the devices. Such devices, and security documents that include them, afford new techniques to check whether a security document is a legitimate or counterfeit copy. |
申请公布号 |
CA2910728(A1) |
申请公布日期 |
2013.03.28 |
申请号 |
CA20122910728 |
申请日期 |
2012.09.19 |
申请人 |
BANK OF CANADA |
发明人 |
MACPHERSON, CHARLES DOUGLAS;GARANZOTIS, THEODOROS |
分类号 |
B42D25/36;B42D25/29;B81B1/00;B82Y20/00;G02F1/01 |
主分类号 |
B42D25/36 |
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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