Railway traffic controlling apparatus,申请号US19320631977-传众专利搜索

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发明名称	Railway traffic controlling apparatus
摘要
申请公布号	US1942614(A)	申请公布日期	1934.01.09
申请号	US19320631977	申请日期	1932.09.07
申请人	THE UNION SWITCH & SIGNAL COMPANY	发明人	O'HAGAN BERNARD E.
分类号	B61L5/06	主分类号	B61L5/06
代理机构		代理人
主权项
地址

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