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经营范围
发明名称
Railway traffic controlling apparatus
摘要
申请公布号
US2039820(A)
申请公布日期
1936.05.05
申请号
US19340752842
申请日期
1934.11.13
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
MCCANN RONALD A.;YOUNG HENRY S.
分类号
B61L29/28
主分类号
B61L29/28
代理机构
代理人
主权项
地址
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