CENTRAL OFFICE INTERFACE CIRCUIT,申请号GB19810007449-传众专利搜索

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发明名称	CENTRAL OFFICE INTERFACE CIRCUIT
摘要
申请公布号	GB2075798(B)	申请公布日期	1985.01.03
申请号	GB19810007449	申请日期	1981.03.10
申请人	NORTHERN TELECOM LTD	发明人
分类号	H04Q3/58;H04M1/738;(IPC1-7):H04M1/72	主分类号	H04Q3/58
代理机构		代理人
主权项
地址

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