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经营范围
发明名称
Rail joint
摘要
申请公布号
US2296853(A)
申请公布日期
1942.09.29
申请号
US19410389355
申请日期
1941.04.19
申请人
HUBBARD AND COMPANY
发明人
JOHNSON KENNETH L.
分类号
E01B11/06
主分类号
E01B11/06
代理机构
代理人
主权项
地址
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