Improvements in and relating to electric signalling systems,申请号GB19310023920-传众专利搜索

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发明名称	Improvements in and relating to electric signalling systems
摘要
申请公布号	GB381669(A)	申请公布日期	1932.10.13
申请号	GB19310023920	申请日期	1931.08.25
申请人	THE BRITISH THOMSON-HOUSTON COMPANY LIMITED	发明人
分类号	G08C19/00	主分类号	G08C19/00
代理机构		代理人
主权项
地址

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