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发明名称
Pin
摘要
申请公布号
US2246453(A)
申请公布日期
1941.06.17
申请号
US19390268990
申请日期
1939.04.20
申请人
MORRIS PAUL K
发明人
MORRIS PAUL K.
分类号
A44B9/14
主分类号
A44B9/14
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代理人
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