Recording and monitoring optical unit,申请号US19470751406-传众专利搜索

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发明名称	Recording and monitoring optical unit
摘要
申请公布号	US2527454(A)	申请公布日期	1950.10.24
申请号	US19470751406	申请日期	1947.05.29
申请人	RADIO CORPORATION OF AMERICA	发明人	SACHTLEBEN LAWRENCE T.;PETTUS JAMES LAWRENCE
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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