Tube électronique comportant un espace vide servant de résonateur,申请号FRD47653-传众专利搜索

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发明名称	Tube électronique comportant un espace vide servant de résonateur
摘要
申请公布号	FR47653(E)	申请公布日期	1937.06.16
申请号	FRD47653	申请日期	1936.08.24
申请人	NAAMLOOZE VENNOOTSCHAP MACHINERIEEN EN APPARATEN FABRIEKEN MEAF	发明人
分类号	H01J25/70	主分类号	H01J25/70
代理机构		代理人
主权项
地址

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