Vacuum tube voltmeter,申请号US19510249000-传众专利搜索

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发明名称	Vacuum tube voltmeter
摘要
申请公布号	US2806208(A)	申请公布日期	1957.09.10
申请号	US19510249000	申请日期	1951.09.29
申请人	COLUMBIA BROADCASTING SYSTEM, INC.	发明人	GIUFFRIDA JOSEPH
分类号	G01R17/16	主分类号	G01R17/16
代理机构		代理人
主权项
地址

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