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经营范围
发明名称
Railway traffic controlling apparatus
摘要
申请公布号
US1875853(A)
申请公布日期
1932.09.06
申请号
US19300447155
申请日期
1930.04.25
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
COLEMAN JOHN P.
分类号
B61L5/04
主分类号
B61L5/04
代理机构
代理人
主权项
地址
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