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发明名称
Mechanical pencil
摘要
申请公布号
US2015673(A)
申请公布日期
1935.10.01
申请号
US19290387542
申请日期
1929.08.21
申请人
HAUTON PAUL S
发明人
HAUTON PAUL S.
分类号
B43K21/08
主分类号
B43K21/08
代理机构
代理人
主权项
地址
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