A telephone system with sub-exchange,申请号GB19610041776-传众专利搜索

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发明名称	A telephone system with sub-exchange
摘要
申请公布号	GB1004090(A)	申请公布日期	1965.09.08
申请号	GB19610041776	申请日期	1961.11.22
申请人	TELEFUNKEN PATENTVERWERTUNGS-G.M.B.H.	发明人
分类号	H04Q3/58	主分类号	H04Q3/58
代理机构		代理人
主权项
地址

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