RAILWAY SIGNALLING SYSTEM,申请号CAD420707-传众专利搜索

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发明名称	RAILWAY SIGNALLING SYSTEM
摘要
申请公布号	CA420707(A)	申请公布日期	1944.06.06
申请号	CAD420707	申请日期
申请人	THE UNION SWITCH AND SIGNAL COMPANY	发明人	FRANK H. NICHOLSON
分类号		主分类号
代理机构		代理人
主权项
地址

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