Electron discharge device,申请号US19240746617-传众专利搜索

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发明名称	Electron discharge device
摘要
申请公布号	US1967575(A)	申请公布日期	1934.07.24
申请号	US19240746617	申请日期	1924.10.29
申请人	RADIO CORPORATION OF AMERICA	发明人	JR. FREDERICK L. HUNTER,
分类号	H01J7/18	主分类号	H01J7/18
代理机构		代理人
主权项
地址

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