Improvements in or relating to telecommunication exchange systems,申请号GB19380000220-传众专利搜索

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发明名称	Improvements in or relating to telecommunication exchange systems
摘要
申请公布号	GB508690(A)	申请公布日期	1939.07.04
申请号	GB19380000220	申请日期	1938.01.04
申请人	STANDARD TELEPHONES AND CABLES LIMITED;ESMOND PHILIP GOODWIN WRIGHT;WILLIAM JOHN REYNOLDS	发明人
分类号	H04M3/523	主分类号	H04M3/523
代理机构		代理人
主权项
地址

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