Improvements in circuits for use in automatic telephone-exchange and like systems,申请号GB19500014444-传众专利搜索

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发明名称	Improvements in circuits for use in automatic telephone-exchange and like systems
摘要
申请公布号	GB686075(A)	申请公布日期	1953.01.14
申请号	GB19500014444	申请日期	1950.06.09
申请人	PHILIPS ELECTRICAL INDUSTRIES LIMITED	发明人
分类号	H04Q1/18	主分类号	H04Q1/18
代理机构		代理人
主权项
地址

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