Perfectionnements aux amplificateurs thermioniques destinés aux phonographes électriques et appareils analogues,申请号FRD688979-传众专利搜索

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发明名称	Perfectionnements aux amplificateurs thermioniques destinés aux phonographes électriques et appareils analogues
摘要
申请公布号	FR688979(A)	申请公布日期	1930.09.01
申请号	FRD688979	申请日期	1930.01.27
申请人		发明人	LACHLAN NORMAN WILLIAM MAC
分类号	H03F1/00	主分类号	H03F1/00
代理机构		代理人
主权项
地址

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