Perfectionnements aux cathodes à chauffage direct pour tubes électroniques,申请号FRD900934-传众专利搜索

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发明名称	Perfectionnements aux cathodes à chauffage direct pour tubes électroniques
摘要
申请公布号	FR900934(A)	申请公布日期	1945.07.12
申请号	FRD900934	申请日期	1944.01.04
申请人	TELEFUNKEN GESELLSCHAFT FU:R DRAHTLOSE TELEGRAPHIE M. B. H.	发明人
分类号	H01J1/18	主分类号	H01J1/18
代理机构		代理人
主权项
地址

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