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发明名称
Pencil sharpener
摘要
申请公布号
US2152545(A)
申请公布日期
1939.03.28
申请号
US19370147554
申请日期
1937.06.10
申请人
FENTON ALVIN L
发明人
FENTON ALVIN L.
分类号
B43L23/00
主分类号
B43L23/00
代理机构
代理人
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