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经营范围
发明名称
Railway traffic controlling apparatus
摘要
申请公布号
US2326622(A)
申请公布日期
1943.08.10
申请号
US19420430776
申请日期
1942.02.13
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
CROOKS RALPH K.
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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