System for audio training,申请号US19620181943-传众专利搜索

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发明名称	System for audio training
摘要
申请公布号	US3244816(A)	申请公布日期	1966.04.05
申请号	US19620181943	申请日期	1962.03.23
申请人	BOWMAR INSTRUMENT CORPORATION	发明人	KARNS RAY L.
分类号	G09B5/04	主分类号	G09B5/04
代理机构		代理人
主权项
地址

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