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发明名称
File fastener
摘要
申请公布号
US2345484(A)
申请公布日期
1944.03.28
申请号
US19420452279
申请日期
1942.07.25
申请人
KRUMWIEDE ELMER E
发明人
KRUMWIEDE ELMER E.
分类号
B42F13/02
主分类号
B42F13/02
代理机构
代理人
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