Improvements in or relating to electrical signalling systems,申请号GB19590012994-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	GB898917(A)	申请公布日期	1962.06.14
申请号	GB19590012994	申请日期	1959.04.16
申请人	BRITISH TELECOMMUNICATIONS RESEARCH LIMITED	发明人	HINGSTON WILLIAM FREDERICK
分类号	H04Q5/00	主分类号	H04Q5/00
代理机构		代理人
主权项
地址

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