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发明名称
Mechanical pencil having side push button actuated lead advance
摘要
申请公布号
US4955739(A)
申请公布日期
1990.09.11
申请号
US19880261244
申请日期
1988.10.21
申请人
KOTOBUKI & CO., LTD.
发明人
KAGEYAMA, HIDEHEI;MITSUYA, YOSHIHIDE;NAKAZATO, YOUICHI
分类号
B43K21/027;B43K21/033;B43K21/16;B43K24/08
主分类号
B43K21/027
代理机构
代理人
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