Apparatus and method for recording sound accurately,申请号US19300456058-传众专利搜索

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发明名称	Apparatus and method for recording sound accurately
摘要
申请公布号	US1993616(A)	申请公布日期	1935.03.05
申请号	US19300456058	申请日期	1930.05.27
申请人	NAKKEN PATENTS CORPORATION	发明人	NAKKEN THEODORUS H.
分类号	G11B5/00	主分类号	G11B5/00
代理机构		代理人
主权项
地址

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