Railway signal lighting control apparatus,申请号US19490079167-传众专利搜索

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发明名称	Railway signal lighting control apparatus
摘要
申请公布号	US2547664(A)	申请公布日期	1951.04.03
申请号	US19490079167	申请日期	1949.03.02
申请人	THE UNION SWITCH AND SIGNAL COMPANY	发明人	ROST OTTO W.
分类号	B61L5/18	主分类号	B61L5/18
代理机构		代理人
主权项
地址

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