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经营范围
发明名称
Spreader
摘要
申请公布号
US2282205(A)
申请公布日期
1942.05.05
申请号
US19390263070
申请日期
1939.03.20
申请人
DAVID B. HARMAN
发明人
OLSEN ERIC H.
分类号
E01C19/20
主分类号
E01C19/20
代理机构
代理人
主权项
地址
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