Magnetic sound recording and reproducing,申请号US19380197851-传众专利搜索

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发明名称	Magnetic sound recording and reproducing
摘要
申请公布号	US2224854(A)	申请公布日期	1940.12.17
申请号	US19380197851	申请日期	1938.03.24
申请人	MAGNETONE INC.	发明人	BEGUN SEMI JOSEPH
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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