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发明名称
Loose-leaf binder
摘要
申请公布号
US2278565(A)
申请公布日期
1942.04.07
申请号
US19410384857
申请日期
1941.03.24
申请人
NATIONAL BLANK BOOK COMPANY
发明人
SCHADE JOHN
分类号
B42F13/00;B42F13/26
主分类号
B42F13/00
代理机构
代理人
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地址
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