Sound-reproducing apparatus,申请号US19270178516-传众专利搜索

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发明名称	Sound-reproducing apparatus
摘要
申请公布号	US1765029(A)	申请公布日期	1930.06.17
申请号	US19270178516	申请日期	1927.03.21
申请人	R. M. COMPANY, INC.	发明人	MURRAY HOWARD J.
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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