Thermionic amplifying device,申请号US19290359813-传众专利搜索

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发明名称	Thermionic amplifying device
摘要
申请公布号	US1892866(A)	申请公布日期	1933.01.03
申请号	US19290359813	申请日期	1929.05.02
申请人	BROWN STANLEY W	发明人	BROWN STANLEY W.
分类号	H01J21/02	主分类号	H01J21/02
代理机构		代理人
主权项
地址

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