Loudspeaker circuits,申请号US19370130834-传众专利搜索

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发明名称	Loudspeaker circuits
摘要
申请公布号	US2134059(A)	申请公布日期	1938.10.25
申请号	US19370130834	申请日期	1937.03.15
申请人	RADIO CORPORATION OF AMERICA	发明人	SCHADE OTTO H.
分类号	H04R3/08	主分类号	H04R3/08
代理机构		代理人
主权项
地址

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