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发明名称
Point and signal control system for railways and the like
摘要
申请公布号
US2289742(A)
申请公布日期
1942.07.14
申请号
US19400366777
申请日期
1940.11.22
申请人
THE UNION SWITCH AND SIGNAL COMPANY
发明人
VENNING CHARLES FRANCIS DICKSON
分类号
B61L21/06
主分类号
B61L21/06
代理机构
代理人
主权项
地址
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