Improvements in devices for measuring or comparing periodic functions,申请号GB19460012298-传众专利搜索

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发明名称	Improvements in devices for measuring or comparing periodic functions
摘要
申请公布号	GB631728(A)	申请公布日期	1949.11.09
申请号	GB19460012298	申请日期	1946.04.23
申请人	UNION D'ELECTRICITE	发明人
分类号	H02H3/26	主分类号	H02H3/26
代理机构		代理人
主权项
地址

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