发明名称 |
Writing surface giving permanent record but easily erasable |
摘要 |
An arrangement for preparing written notes or drawings which can be altered and stored has a flat writing area (A) with a smooth, water repellant surface where the wetting angle of a water droplet is greater than 60 deg . It is used with a crayon of water and wipe-resistant material and a rubber which can remove surface marks without damage.
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申请公布号 |
DE19837232(A1) |
申请公布日期 |
1999.02.25 |
申请号 |
DE19981037232 |
申请日期 |
1998.08.17 |
申请人 |
HECKMANN, KLAUS, PROF. DR., 93186 PETTENDORF, DE |
发明人 |
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分类号 |
B32B27/08;B41M7/00;B43L1/00;(IPC1-7):B43L1/00;B43K19/00;B43L19/00 |
主分类号 |
B32B27/08 |
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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