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发明名称
Loose-leaf binder
摘要
申请公布号
US1747257(A)
申请公布日期
1930.02.18
申请号
US19290367572
申请日期
1929.05.31
申请人
MCMILLAN BOOK COMPANY
发明人
MCMILLAN JOHN L.
分类号
B42F13/28
主分类号
B42F13/28
代理机构
代理人
主权项
地址
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