发明名称 |
Authenticating and anti-counterfeiting device for currency |
摘要 |
Currency or other documents or items of value containing a liquid crystal/photovoltaic device which produces a coded display in response to artificial or ambient light. Such a device functions both as an anti-counterfeiting deterrent and also as a means for permitting the man-in-the-street easily to authenticate the validity of a document containing such a device.
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申请公布号 |
US4472627(A) |
申请公布日期 |
1984.09.18 |
申请号 |
US19820431887 |
申请日期 |
1982.09.30 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE TREASURY |
发明人 |
WEINBERGER, LESTER |
分类号 |
D21H21/48;G06K19/067;G07D7/00;G07F7/08;(IPC1-7):G06K19/06 |
主分类号 |
D21H21/48 |
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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