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经营范围
发明名称
Railway traffic controlling apparatus
摘要
申请公布号
US2216607(A)
申请公布日期
1940.10.01
申请号
US19390286012
申请日期
1939.07.22
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
ALLEN EARL M.
分类号
B61L19/06;B61L21/06
主分类号
B61L19/06
代理机构
代理人
主权项
地址
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