Electron discharge devices,申请号US19520315284-传众专利搜索

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发明名称	Electron discharge devices
摘要
申请公布号	US2840749(A)	申请公布日期	1958.06.24
申请号	US19520315284	申请日期	1952.10.17
申请人	BELL TELEPHONE LABORATORIES, INCORPORATED	发明人	GODDARD CHARLES T.
分类号	H01J21/36	主分类号	H01J21/36
代理机构		代理人
主权项
地址

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