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发明名称
Pencil
摘要
申请公布号
US1849914(A)
申请公布日期
1932.03.15
申请号
US19300483455
申请日期
1930.09.22
申请人
DELVIN HART E
发明人
DELVIN HART E.
分类号
B43K29/06
主分类号
B43K29/06
代理机构
代理人
主权项
地址
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