Reproduction of sound records,申请号US19300422151-传众专利搜索

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发明名称	Reproduction of sound records
摘要
申请公布号	US1917003(A)	申请公布日期	1933.07.04
申请号	US19300422151	申请日期	1930.01.20
申请人	COLUMBIA PHONO GRAPH COMPANY, INC.	发明人	WILLIAMS WILLIAM EWART
分类号	G11B7/08;G11B7/09;G11B7/135	主分类号	G11B7/08
代理机构		代理人
主权项
地址

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