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发明名称
Loose-leaf binder
摘要
申请公布号
US2637326(A)
申请公布日期
1953.05.05
申请号
US19520288149
申请日期
1952.05.16
申请人
PHILLIP WITZ
发明人
WITZ PHILLIP
分类号
B42F13/12
主分类号
B42F13/12
代理机构
代理人
主权项
地址
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