Electron discharge device,申请号US19340722704-传众专利搜索

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发明名称	Electron discharge device
摘要
申请公布号	US2086578(A)	申请公布日期	1937.07.13
申请号	US19340722704	申请日期	1934.04.27
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	SAMUEL ARTHUR L.
分类号	H01J21/06	主分类号	H01J21/06
代理机构		代理人
主权项
地址

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