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发明名称
Ring binder
摘要
申请公布号
US3104667(A)
申请公布日期
1963.09.24
申请号
US19610157659
申请日期
1961.12.07
申请人
JULIUS MINTZ
发明人
MINTZ JULIUS
分类号
B42F13/24
主分类号
B42F13/24
代理机构
代理人
主权项
地址
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