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经营范围
发明名称
Railway traffic controlling apparatus
摘要
申请公布号
US2312740(A)
申请公布日期
1943.03.02
申请号
US19410401757
申请日期
1941.07.10
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
VANHORN JAMES J.
分类号
B61L23/22
主分类号
B61L23/22
代理机构
代理人
主权项
地址
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