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经营范围
发明名称
Railway traffic controlling apparatus
摘要
申请公布号
US2266904(A)
申请公布日期
1941.12.23
申请号
US19400369929
申请日期
1940.12.13
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
PLACE WILLARD P.
分类号
B61L3/22
主分类号
B61L3/22
代理机构
代理人
主权项
地址
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