Electron beam amplifier device,申请号US19490069634-传众专利搜索

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发明名称	Electron beam amplifier device
摘要
申请公布号	US2782339(A)	申请公布日期	1957.02.19
申请号	US19490069634	申请日期	1949.01.07
申请人	RADIO CORPORATION	发明人	NERGAARD LEON S.
分类号	H01J25/48	主分类号	H01J25/48
代理机构		代理人
主权项
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