Perfectionnements apportés aux tubes amplificateurs électriques,申请号FRD769406-传众专利搜索

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发明名称	Perfectionnements apportés aux tubes amplificateurs électriques
摘要
申请公布号	FR769406(A)	申请公布日期	1934.08.25
申请号	FRD769406	申请日期	1934.02.27
申请人	N. V. PHILIPS' GLOEILAMPENFABRIEKEN	发明人
分类号	H01R33/22;H03F3/28;H03F3/32	主分类号	H01R33/22
代理机构		代理人
主权项
地址

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