Tube à vide à électrodes multiples, à source émettrice séparée de l'élément chauffant,申请号FRD695072-传众专利搜索

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发明名称	Tube à vide à électrodes multiples, à source émettrice séparée de l'élément chauffant
摘要
申请公布号	FR695072(A)	申请公布日期	1930.12.11
申请号	FRD695072	申请日期	1929.08.13
申请人		发明人	CLAUDE RENE
分类号	H01J1/20	主分类号	H01J1/20
代理机构		代理人
主权项
地址

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