- 专利标题： Anti-Rotation Extendable Eraser Mechanism
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申请号： US15833752申请日： 2017-12-06
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公开(公告)号： US20180154682A1公开(公告)日： 2018-06-07
- 发明人: Kenneth Swanick
- 申请人： Sanford, L.P.
- 主分类号： B43K29/02
- IPC分类号： B43K29/02
摘要：
An anti-rotation mechanism for a retractable eraser or other stick-like object for use with a writing instrument that utilizes locking elements to prevent the inadvertent retraction or extension of the eraser when pressure is applied to the eraser during the erasing operation.
公开/授权文献
- US10272714B2 Anti-rotation extendable eraser mechanism 公开/授权日：2019-04-30
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