DIRECTIONAL RELAY CONTROL CIRCUITS FOR RAILWAY SIGNALING SYSTEMS,申请号CAD507041-传众专利搜索

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发明名称	DIRECTIONAL RELAY CONTROL CIRCUITS FOR RAILWAY SIGNALING SYSTEMS
摘要
申请公布号	CA507041(A)	申请公布日期	1954.11.02
申请号	CAD507041	申请日期
申请人	THE UNION SWITCH AND SIGNAL COMPANY	发明人	CRAWFORD E. STAPLES
分类号		主分类号
代理机构		代理人
主权项
地址

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