IMPROVEMENTS IN OR RELATING TO TELEPHONE LINE LOOP-DETECTING CIRCUITS,申请号GB19700009639-传众专利搜索

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发明名称	IMPROVEMENTS IN OR RELATING TO TELEPHONE LINE LOOP-DETECTING CIRCUITS
摘要
申请公布号	GB1274957(A)	申请公布日期	1972.05.17
申请号	GB19700009639	申请日期	1970.02.27
申请人	THE GENERAL ELECTRIC COMPANY LIMITED	发明人	NORMAN DOUGLAS GILBERT
分类号	H04M3/22	主分类号	H04M3/22
代理机构		代理人
主权项
地址

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