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发明名称
Ring binder
摘要
申请公布号
US2321560(A)
申请公布日期
1943.06.08
申请号
US19420467641
申请日期
1942.12.02
申请人
TRUSSELL MANUFACTURING COMPANY
发明人
TRUSSELL CLARENCE D.
分类号
B42F13/16
主分类号
B42F13/16
代理机构
代理人
主权项
地址
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