Improvements relating to automatic telephone and like selective systems,申请号GB19510013057-传众专利搜索

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发明名称	Improvements relating to automatic telephone and like selective systems
摘要
申请公布号	GB717681(A)	申请公布日期	1954.11.03
申请号	GB19510013057	申请日期	1951.06.01
申请人	SIEMENS BROTHERS & CO. LIMITED	发明人	LONG DOUGLAS PERCY
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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