ELECTRIC SIGNALLING SYSTEMS,申请号CAD496169-传众专利搜索

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发明名称	ELECTRIC SIGNALLING SYSTEMS
摘要
申请公布号	CA496169(A)	申请公布日期	1953.09.15
申请号	CAD496169	申请日期
申请人	SIEMENS BROTHERS AND CO. LIMITED	发明人	DAVID A. CHRISTIAN
分类号		主分类号
代理机构		代理人
主权项
地址

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