Improvements in thermionic valve amplifiers,申请号GB19290016674-传众专利搜索

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发明名称	Improvements in thermionic valve amplifiers
摘要
申请公布号	GB330395(A)	申请公布日期	1930.06.12
申请号	GB19290016674	申请日期	1929.05.30
申请人	JOSEPH FELDMAN	发明人
分类号	H03F1/54;H03F3/22	主分类号	H03F1/54
代理机构		代理人
主权项
地址

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