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经营范围
发明名称
Railroad tie
摘要
申请公布号
US2370715(A)
申请公布日期
1945.03.06
申请号
US19430499796
申请日期
1943.08.24
申请人
CARMICHAEL JAMES B
发明人
CARMICHAEL JAMES B.
分类号
E01B3/16;E01B9/32
主分类号
E01B3/16
代理机构
代理人
主权项
地址
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