Thermionic amplifier,申请号US19300477304-传众专利搜索

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发明名称	Thermionic amplifier
摘要
申请公布号	US2007938(A)	申请公布日期	1935.07.09
申请号	US19300477304	申请日期	1930.08.23
申请人	SIRIAN LAMP COMPANY	发明人	RUBEN SAMUEL
分类号	H01J17/54	主分类号	H01J17/54
代理机构		代理人
主权项
地址

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