Alternating current heated thermionic device,申请号US19300427170-传众专利搜索

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发明名称	Alternating current heated thermionic device
摘要
申请公布号	US1938636(A)	申请公布日期	1933.12.12
申请号	US19300427170	申请日期	1930.02.10
申请人	RADIO CORPORATION OF AMERICA	发明人	OOSTERHUIS EKKO
分类号	H01J1/13	主分类号	H01J1/13
代理机构		代理人
主权项
地址

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