Sound reproducing or recording apparatus,申请号US19260137713-传众专利搜索

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发明名称	Sound reproducing or recording apparatus
摘要
申请公布号	US1803403(A)	申请公布日期	1931.05.05
申请号	US19260137713	申请日期	1926.09.25
申请人	OWENS FREEMAN H	发明人	OWENS FREEMAN H.
分类号	G11B25/10	主分类号	G11B25/10
代理机构		代理人
主权项
地址

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