Portable disk-type magnetic recording apparatus,申请号US19540459481-传众专利搜索

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发明名称	Portable disk-type magnetic recording apparatus
摘要
申请公布号	US2975238(A)	申请公布日期	1961.03.14
申请号	US19540459481	申请日期	1954.09.30
申请人	RADIO CORPORATION OF AMERICA	发明人	JONES LOREN F.
分类号	G11B5/00;G11B25/04	主分类号	G11B5/00
代理机构		代理人
主权项
地址

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