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发明名称
Loose-leaf binder construction
摘要
申请公布号
US2523724(A)
申请公布日期
1950.09.26
申请号
US19470737536
申请日期
1947.03.27
申请人
WILLIAM SATZ
发明人
SATZ WILLIAM
分类号
B42F7/06
主分类号
B42F7/06
代理机构
代理人
主权项
地址
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