Improvements in or relating to systems for electrical communication over a common medium,申请号GB19470002525-传众专利搜索

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发明名称	Improvements in or relating to systems for electrical communication over a common medium
摘要
申请公布号	GB648674(A)	申请公布日期	1951.01.10
申请号	GB19470002525	申请日期	1947.01.27
申请人	BRITISH TELECOMMUNICATION RESEARCH LIMITED	发明人	BELLAIRS GUY FFARINGTON;IRELAND JOHN CHARLES
分类号	H04M7/16	主分类号	H04M7/16
代理机构		代理人
主权项
地址

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