Improvements in or relating to electron discharge device audio amplifiers,申请号GB19380034258-传众专利搜索

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发明名称	Improvements in or relating to electron discharge device audio amplifiers
摘要
申请公布号	GB500865(A)	申请公布日期	1939.02.16
申请号	GB19380034258	申请日期	1938.11.24
申请人	FREDERICK JAMES CHART	发明人
分类号	H03G5/06	主分类号	H03G5/06
代理机构		代理人
主权项
地址

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