DIRECTIONAL RELAY CIRCUITS FOR CODED RAILWAY SIGNALING SYSTEMS,申请号CAD539453-传众专利搜索

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发明名称	DIRECTIONAL RELAY CIRCUITS FOR CODED RAILWAY SIGNALING SYSTEMS
摘要
申请公布号	CA539453(A)	申请公布日期	1957.04.09
申请号	CAD539453	申请日期
申请人	WESTINGHOUSE AIR BRAKE COMPANY	发明人	THOMAS W. TIZZARD JR.
分类号		主分类号
代理机构		代理人
主权项
地址

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