Horn or amplifier,申请号US19300441920-传众专利搜索

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发明名称	Horn or amplifier
摘要
申请公布号	US1816546(A)	申请公布日期	1931.07.28
申请号	US19300441920	申请日期	1930.04.05
申请人	SVERRE RASMUSSEN	发明人	RASMUSSEN SVERRE
分类号	G10K13/00	主分类号	G10K13/00
代理机构		代理人
主权项
地址

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