Improved call finding arrangements in automatic telephone systems,申请号GB19300012794-传众专利搜索

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发明名称	Improved call finding arrangements in automatic telephone systems
摘要
申请公布号	GB349256(A)	申请公布日期	1931.05.28
申请号	GB19300012794	申请日期	1930.04.25
申请人	SIEMENS BROTHERS & CO., LIMITED;REGINALD GRIFFITH DIXON	发明人
分类号	H04Q3/00	主分类号	H04Q3/00
代理机构		代理人
主权项
地址

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