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发明名称
Loose-leaf binder
摘要
申请公布号
US2878816(A)
申请公布日期
1959.03.24
申请号
US19560603588
申请日期
1956.08.13
申请人
THE HEINN COMPANY
发明人
PANFIL CONRAD J.
分类号
B42F13/20
主分类号
B42F13/20
代理机构
代理人
主权项
地址
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