Improvements in or relating to gas-filled thermionic valves,申请号GB19490006641-传众专利搜索

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发明名称	Improvements in or relating to gas-filled thermionic valves
摘要
申请公布号	GB663290(A)	申请公布日期	1951.12.19
申请号	GB19490006641	申请日期	1949.03.10
申请人	THE M-O VALVE COMPANY LIMITED;JAMES BELL;DONALD ARTHUR WRIGHT	发明人
分类号	H01J17/26	主分类号	H01J17/26
代理机构		代理人
主权项
地址

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