Improvements in devices for comparing an electrical frequency with a reference frequency,申请号GB19570025578-传众专利搜索

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发明名称	Improvements in devices for comparing an electrical frequency with a reference frequency
摘要
申请公布号	GB855426(A)	申请公布日期	1960.11.30
申请号	GB19570025578	申请日期	1957.08.13
申请人	ELECTRICITE DE FRANCE, SERVICE NATIONAL	发明人
分类号	G01R23/02	主分类号	G01R23/02
代理机构		代理人
主权项
地址

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