Electron discharge tube,申请号US19330703239-传众专利搜索

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发明名称	Electron discharge tube
摘要
申请公布号	US2080098(A)	申请公布日期	1937.05.11
申请号	US19330703239	申请日期	1933.12.20
申请人	TELEFUNKEN GESELLSCHAFT FUR DRAHTLOSE TELEGRAPHIE M.B.H.	发明人	STEIMEL KARL
分类号	H01J21/20	主分类号	H01J21/20
代理机构		代理人
主权项
地址

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