发明名称 |
Combined chalk and eraser dispenser |
摘要 |
A combined chalk and chalkboard eraser dispenser includes a vertical planar rear wall, a vertical planar front wall spaced forward from the rear wall by approximately the height of a standard blackboard eraser, and a horizontal planar bottom ledge projecting forward from the lower edge of the rear wall, an eraser dispenser opening being defined between a lower edge of the front wall and a forward edge of the bottom ledge. Chalk receptacles are substantially in the form of rectangular boxes having a open horizontal forward face. The depth of the chalk dispenser is preferably slightly less than the length of a standard piece of chalk.
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申请公布号 |
US5351840(A) |
申请公布日期 |
1994.10.04 |
申请号 |
US19920940250 |
申请日期 |
1992.09.04 |
申请人 |
UNIVERSITY OF PENNSYLVANIA |
发明人 |
VISCO, LOUIS A.;GRAVINA, ARTHUR |
分类号 |
B43K31/00;B43L21/04;(IPC1-7):A47F7/00 |
主分类号 |
B43K31/00 |
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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