Improvements in or relating to telephone or like systems,申请号GB19380034211-传众专利搜索

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发明名称	Improvements in or relating to telephone or like systems
摘要
申请公布号	GB521802(A)	申请公布日期	1940.05.31
申请号	GB19380034211	申请日期	1938.11.24
申请人	AUTOMATIC TELEPHONE & ELECTRIC COMPANY LIMITED;HORACE EDWARD HOPLEY	发明人
分类号	H04Q1/26	主分类号	H04Q1/26
代理机构		代理人
主权项
地址

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