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发明名称
Traffic detecting means for protecting operation of railway track switches and the like
摘要
申请公布号
US2549146(A)
申请公布日期
1951.04.17
申请号
US19460681171
申请日期
1946.07.03
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
HORN JAMES J. VAN
分类号
B61L13/00
主分类号
B61L13/00
代理机构
代理人
主权项
地址
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