Improvements in and relating to the production of sound effects by means of thermionic valve oscillators,申请号GB19300025880-传众专利搜索

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发明名称	Improvements in and relating to the production of sound effects by means of thermionic valve oscillators
摘要
申请公布号	GB347082(A)	申请公布日期	1931.04.23
申请号	GB19300025880	申请日期	1930.08.29
申请人	PETER LERTES;BRUNO HELBERGER	发明人
分类号	G10H5/02	主分类号	G10H5/02
代理机构		代理人
主权项
地址

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