Improvements relating to automatic telephone systems,申请号GB19360019179-传众专利搜索

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发明名称	Improvements relating to automatic telephone systems
摘要
申请公布号	GB477557(A)	申请公布日期	1938.01.03
申请号	GB19360019179	申请日期	1936.07.10
申请人	SIEMENS BROTHERS & CO. LIMITED;REGINALD GRIFFITH DIXON	发明人
分类号	H04Q3/62	主分类号	H04Q3/62
代理机构		代理人
主权项
地址

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