DIRECTLY HEATED CATHODES,申请号EP19890300425-传众专利搜索

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发明名称	DIRECTLY HEATED CATHODES
摘要
申请公布号	EP0326273(A3)	申请公布日期	1990.07.11
申请号	EP19890300425	申请日期	1989.01.18
申请人	EEV LIMITED	发明人	PICKERING, ALAN HUGH
分类号	H01J1/16;H01J1/15;(IPC1-7):H01J1/15	主分类号	H01J1/16
代理机构		代理人
主权项
地址

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