Sound reproducing apparatus,申请号US19340750632-传众专利搜索

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发明名称	Sound reproducing apparatus
摘要
申请公布号	US2036832(A)	申请公布日期	1936.04.07
申请号	US19340750632	申请日期	1934.10.30
申请人	RADIO CORPORATION OF AMERICA	发明人	SCHELDORF MARVEL W.
分类号	H04R1/02	主分类号	H04R1/02
代理机构		代理人
主权项
地址

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