Improvements in or relating to electrical signalling systems,申请号GB19610006706-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	GB964710(A)	申请公布日期	1964.07.22
申请号	GB19610006706	申请日期	1961.02.23
申请人	BRITISH TELECOMMUNICATIONS RESEARCH LIMITED	发明人	HART RONALD IAN;THOMAS DAVID LLEWELYN
分类号	H04J3/06;H04Q11/04	主分类号	H04J3/06
代理机构		代理人
主权项
地址

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