Improvements in or relating to telephone systems,申请号GB19280036193-传众专利搜索

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发明名称	Improvements in or relating to telephone systems
摘要
申请公布号	GB326234(A)	申请公布日期	1930.03.07
申请号	GB19280036193	申请日期	1928.12.07
申请人	AUTOMATIC TELEPHONE MANUFACTURING COMPANY LIMITED;FRANK KESSLER;HERBERT STANLEY DEYES;JACK SCOWCROFT	发明人
分类号	H04Q3/58	主分类号	H04Q3/58
代理机构		代理人
主权项
地址

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