Improvements in and relating to electron discharge devices,申请号GB19470034741-传众专利搜索

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发明名称	Improvements in and relating to electron discharge devices
摘要
申请公布号	GB643092(A)	申请公布日期	1950.09.15
申请号	GB19470034741	申请日期	1947.12.30
申请人	METROPOLITAN-VICKERS ELECTRICAL COMPANY LIMITED	发明人
分类号	H01J1/18	主分类号	H01J1/18
代理机构		代理人
主权项
地址

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