| 发明名称 |
Sheet materials |
| 摘要 |
A sheet material such as paper is provided during manufacture with an elongate element partially disposed within the thickness of the paper sheet but exposed at spaced locations one one side of the sheet. The paper may be used in making security documents such as banknotes and checks.
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| 申请公布号 |
US4462866(A) |
申请公布日期 |
1984.07.31 |
| 申请号 |
US19820350027 |
申请日期 |
1982.02.18 |
| 申请人 |
PORTALS LIMITED |
发明人 |
TOOTH, ALAN J.;PASK, NEIL |
| 分类号 |
B42D15/00;B44F1/12;D21F11/00;D21H21/42;D21H27/34;(IPC1-7):D21D3/00 |
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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