Improvements in or relating to electrical signalling systems,申请号GB19560022191-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	GB810354(A)	申请公布日期	1959.03.11
申请号	GB19560022191	申请日期	1956.07.18
申请人	AUTOMATIC TELEPHONE & ELECTRIC COMPANY LIMITED	发明人	HOBBS ROBERT LAMONT;ALLEN LESLIE JOHN
分类号	H04Q1/446	主分类号	H04Q1/446
代理机构		代理人
主权项
地址

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