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发明名称
Loose-leaf binder
摘要
申请公布号
US2571945(A)
申请公布日期
1951.10.16
申请号
US19460670174
申请日期
1946.05.16
申请人
BOORUM AND PEASE COMPANY
发明人
RENNIE JOHN A.
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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