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发明名称
Expandable ring binder
摘要
申请公布号
US3373748(A)
申请公布日期
1968.03.19
申请号
US19660569318
申请日期
1966.08.01
申请人
RONALD J. MACCORMACK
发明人
MACCORMACK RONALD J.
分类号
B42B5/10;B42F13/16
主分类号
B42B5/10
代理机构
代理人
主权项
地址
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