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发明名称
Loose leaf binder
摘要
申请公布号
US2114944(A)
申请公布日期
1938.04.19
申请号
US19370131055
申请日期
1937.03.15
申请人
THOMAS ROBERT W
发明人
THOMAS ROBERT W.
分类号
B42F13/12
主分类号
B42F13/12
代理机构
代理人
主权项
地址
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