Improvements in or relating to thermionic valves,申请号GB19370022119-传众专利搜索

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发明名称	Improvements in or relating to thermionic valves
摘要
申请公布号	GB499971(A)	申请公布日期	1939.02.01
申请号	GB19370022119	申请日期	1937.08.11
申请人	THE M-O VALVE COMPANY LIMITED;GEOFFREY WILLIAM WARREN	发明人
分类号	H01J19/82	主分类号	H01J19/82
代理机构		代理人
主权项
地址

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