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发明名称
Simplified loose-leaf binder
摘要
申请公布号
US2498584(A)
申请公布日期
1950.02.21
申请号
US19450628679
申请日期
1945.11.15
申请人
WILSON-JONES CO.
发明人
SEGAL SAMUEL
分类号
B42F13/20
主分类号
B42F13/20
代理机构
代理人
主权项
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