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发明名称
Loose-leaf binder
摘要
申请公布号
US2178472(A)
申请公布日期
1939.10.31
申请号
US19380247907
申请日期
1938.12.27
申请人
DORTCH EULIE G
发明人
DORTCH EULIE G.
分类号
B42F13/00
主分类号
B42F13/00
代理机构
代理人
主权项
地址
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