Improvements in or relating to electron discharge devices employing magnetic focussing arrangements,申请号GB19370009255-传众专利搜索

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发明名称	Improvements in or relating to electron discharge devices employing magnetic focussing arrangements
摘要
申请公布号	GB496751(A)	申请公布日期	1938.12.01
申请号	GB19370009255	申请日期	1937.04.01
申请人	HAROLD MILLER	发明人
分类号	H01J29/66	主分类号	H01J29/66
代理机构		代理人
主权项
地址

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