TELEPHONE RINGER CIRCUIT,申请号GB19900026504-传众专利搜索

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发明名称	TELEPHONE RINGER CIRCUIT
摘要
申请公布号	GB9026504(D0)	申请公布日期	1991.01.23
申请号	GB19900026504	申请日期	1990.12.05
申请人	GEC PLESSEY TELECOMMUNICATIONS LIMITED	发明人
分类号	H04M3/02;H02M7/538;H03K17/687;H03K17/691;H04M19/02	主分类号	H04M3/02
代理机构		代理人
主权项
地址

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