Periodic permanent magnet focusing system for electron discharge devices,申请号US19660551076-传众专利搜索

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发明名称	Periodic permanent magnet focusing system for electron discharge devices
摘要
申请公布号	US3401295(A)	申请公布日期	1968.09.10
申请号	US19660551076	申请日期	1966.05.18
申请人	HITACHI, LTD.	发明人	SUZUKI YOSHIHISA
分类号	H01J23/087	主分类号	H01J23/087
代理机构		代理人
主权项
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