Improvements in or relating to electrical signalling systems,申请号GB19480032648-传众专利搜索

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发明名称	Improvements in or relating to electrical signalling systems
摘要
申请公布号	GB654137(A)	申请公布日期	1951.06.06
申请号	GB19480032648	申请日期	1948.12.17
申请人	AUTOMATIC TELEPHONE & ELECTRIC COMPANY LIMITED	发明人	BAKER GEORGE THOMAS;DAVISON ALAN
分类号	H04M15/08	主分类号	H04M15/08
代理机构		代理人
主权项
地址

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