Sound recording and reproducing apparatus,申请号US19390251085-传众专利搜索

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发明名称	Sound recording and reproducing apparatus
摘要
申请公布号	US2201614(A)	申请公布日期	1940.05.21
申请号	US19390251085	申请日期	1939.01.16
申请人	GRANT JR HARRY C	发明人	JR. HARRY C. GRANT,
分类号	G11B3/04	主分类号	G11B3/04
代理机构		代理人
主权项
地址

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