System of sound recording and reproduction,申请号US19290368038-传众专利搜索

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发明名称	System of sound recording and reproduction
摘要
申请公布号	US1879423(A)	申请公布日期	1932.09.27
申请号	US19290368038	申请日期	1929.06.03
申请人	JOHN NEALE	发明人	NEALE JOHN
分类号	G11B7/00	主分类号	G11B7/00
代理机构		代理人
主权项
地址

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