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.
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
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