Electron discharge device,申请号US19220602977-传众专利搜索

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发明名称	Electron discharge device
摘要
申请公布号	US1925300(A)	申请公布日期	1933.09.05
申请号	US19220602977	申请日期	1922.11.24
申请人	RAYTHEON, INC.	发明人	BUSH VANNEVAR
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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