Telephone line circuit,申请号GB19790025775-传众专利搜索

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发明名称	Telephone line circuit
摘要
申请公布号	GB2055021(A)	申请公布日期	1981.02.18
申请号	GB19790025775	申请日期	1979.07.24
申请人	MITEL CORP	发明人
分类号	H04B1/58;H04M19/00;(IPC1-7):H04B1/58;H03F3/62	主分类号	H04B1/58
代理机构		代理人
主权项
地址

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