Improvements in or relating to apparatus for supplying ringing current in automatic telephone-exchange and like systems,申请号GB19510028023-传众专利搜索

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发明名称	Improvements in or relating to apparatus for supplying ringing current in automatic telephone-exchange and like systems
摘要
申请公布号	GB699941(A)	申请公布日期	1953.11.18
申请号	GB19510028023	申请日期	1951.11.29
申请人	PHILIPS ELECTRICAL INDUSTRIES LIMITED	发明人
分类号	H04M19/02	主分类号	H04M19/02
代理机构		代理人
主权项
地址

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