Filament positioning means for electron discharge devices,申请号US19570638405-传众专利搜索

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发明名称	Filament positioning means for electron discharge devices
摘要
申请公布号	US2920226(A)	申请公布日期	1960.01.05
申请号	US19570638405	申请日期	1957.02.05
申请人	RAYTHEON COMPANY	发明人	BASSETT MARGARET
分类号	H01J1/18;H01J19/42	主分类号	H01J1/18
代理机构		代理人
主权项
地址

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