Improvements in or relating to telephone systems,申请号GB19310030588-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	GB371358(A)	申请公布日期	1932.04.19
申请号	GB19310030588	申请日期	1931.01.19
申请人	AUTOMATIC ELECTRIC COMPANY LIMITED;REGINALD TAYLOR	发明人
分类号	H04M15/10;H04Q3/00	主分类号	H04M15/10
代理机构		代理人
主权项
地址

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