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发明名称
Loose-leaf binder
摘要
申请公布号
US2288189(A)
申请公布日期
1942.06.30
申请号
US19410379954
申请日期
1941.02.21
申请人
GUINANE JAMES P
发明人
GUINANE JAMES P.
分类号
B42F13/28
主分类号
B42F13/28
代理机构
代理人
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