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发明名称
Openable binder rings and book binders
摘要
申请公布号
US2985173(A)
申请公布日期
1961.05.23
申请号
US19590824745
申请日期
1959.07.02
申请人
WHITE WILLIAM D
发明人
WHITE WILLIAM D.
分类号
B42F13/00;B42F13/16
主分类号
B42F13/00
代理机构
代理人
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地址
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