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发明名称
Pointer for pencil lead
摘要
申请公布号
US2359093(A)
申请公布日期
1944.09.26
申请号
US19440516965
申请日期
1944.01.04
申请人
NATHANIEL EASTMAN
发明人
EASTMAN NATHANIEL
分类号
B43L23/00
主分类号
B43L23/00
代理机构
代理人
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