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发明名称
Sectional binder
摘要
申请公布号
US2557521(A)
申请公布日期
1951.06.19
申请号
US19500150433
申请日期
1950.03.18
申请人
TRUSSELL CLARENCE D
发明人
TRUSSELL CLARENCE D.
分类号
B42F13/00
主分类号
B42F13/00
代理机构
代理人
主权项
地址
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