| 发明名称 |
Tamper-resistant article and method of authenticating the same |
| 摘要 |
A printed document, such as a lottery ticket, includes a thermochromic layer at least over the imprinted data region. The printed document can be authenticated by applying heat to the thermochromic material and observing the presence or absence of a reversible color change.
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| 申请公布号 |
US5403039(A) |
申请公布日期 |
1995.04.04 |
| 申请号 |
US19920960900 |
申请日期 |
1992.10.14 |
| 申请人 |
BABN TECHNOLOGIES, INC. |
发明人 |
BOROWSKI, JR., JOSEPH C.;FULTON, ROBERT O.;LAVOIE, JACQUES |
| 分类号 |
A63F3/06;G07D7/14;(IPC1-7):B42D15/00 |
主分类号 |
A63F3/06 |
| 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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