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经营范围
发明名称
Railway-traffic-controlling apparatus
摘要
申请公布号
US1773297(A)
申请公布日期
1930.08.19
申请号
US19270238548
申请日期
1927.12.08
申请人
THE UNION SWITCH & SIGNAL COMPANY
发明人
BOSSART PAUL N.
分类号
B61L3/12
主分类号
B61L3/12
代理机构
代理人
主权项
地址
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