Improvements in or relating to automatic or semi-automatic telephone exchange systems,申请号GB19290037990-传众专利搜索

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法人/股东/高管

发明名称	Improvements in or relating to automatic or semi-automatic telephone exchange systems
摘要
申请公布号	GB344857(A)	申请公布日期	1931.03.11
申请号	GB19290037990	申请日期	1929.12.11
申请人	STANDARD TELEPHONES AND CABLES LIMITED;ESMOND PHILIP GOODWIN WRIGHT	发明人
分类号	H04Q3/42	主分类号	H04Q3/42
代理机构		代理人
主权项
地址

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