Improvements in or relating to electron discharge devices or valves,申请号GB19330012826-传众专利搜索

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发明名称	Improvements in or relating to electron discharge devices or valves
摘要
申请公布号	GB418990(A)	申请公布日期	1934.11.02
申请号	GB19330012826	申请日期	1933.05.02
申请人	TELEFUNKEN GESELLSCHAFT FUR 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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