Improvements in or relating to electron discharge devices,申请号GB19370007192-传众专利搜索

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发明名称	Improvements in or relating to electron discharge devices
摘要
申请公布号	GB476144(A)	申请公布日期	1937.12.02
申请号	GB19370007192	申请日期	1937.03.11
申请人	TELEFUNKEN GESELLSCHAFT FUER DRAHTLOSE TELEGRAPHIE M.B.H.	发明人
分类号	H01J19/00	主分类号	H01J19/00
代理机构		代理人
主权项
地址

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