Long scale frequency meter,申请号US19390261033-传众专利搜索

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发明名称	Long scale frequency meter
摘要
申请公布号	US2220731(A)	申请公布日期	1940.11.05
申请号	US19390261033	申请日期	1939.03.10
申请人	GENERAL ELECTRIC COMPANY	发明人	ROWELL RALPH M.
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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