Improvements in or relating to thermionic amplifiers with negative feedback and volume control,申请号GB19390028510-传众专利搜索

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发明名称	Improvements in or relating to thermionic amplifiers with negative feedback and volume control
摘要
申请公布号	GB533254(A)	申请公布日期	1941.02.10
申请号	GB19390028510	申请日期	1939.10.23
申请人	PHILIPS LAMPS LIMITED	发明人
分类号	H03G9/08	主分类号	H03G9/08
代理机构		代理人
主权项
地址

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