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发明名称
Loose-leaf binder
摘要
申请公布号
US2273746(A)
申请公布日期
1942.02.17
申请号
US19400364573
申请日期
1940.11.06
申请人
DABNEY WHITE WILLIAM
发明人
WHITE WILLIAM DABNEY
分类号
B42F13/16
主分类号
B42F13/16
代理机构
代理人
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