| 发明名称 |
Pocket liner |
| 摘要 |
In an element for a book which includes a sheet having a slit configured for receiving an item through the sheet, the improvement includes the slit going to two folds of the sheet along fold lines that are transverse to the slit, the folds being at angles that are 90 degrees or less.
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| 申请公布号 |
US5941571(A) |
申请公布日期 |
1999.08.24 |
| 申请号 |
US19970950957 |
申请日期 |
1997.10.15 |
| 申请人 |
SPECIALTY LOOSE LEAF, INC. |
发明人 |
WILSON, ROBERT B.;SCHWEITZER, FREDERICK CHRISTIAN |
| 分类号 |
B42D3/12;(IPC1-7):B42D15/00;B42D15/08 |
主分类号 |
B42D3/12 |
| 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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