Improvements in and relating to thermionic amplifiers,申请号GB19330026294-传众专利搜索

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发明名称	Improvements in and relating to thermionic amplifiers
摘要
申请公布号	GB425696(A)	申请公布日期	1935.03.20
申请号	GB19330026294	申请日期	1933.09.23
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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