AUTOMATIC FOCUSING CIRCUIT FOR OPTICAL DISK MEDIUM EVALUATING DEVICE,申请号JP19890005182-传众专利搜索

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发明名称	AUTOMATIC FOCUSING CIRCUIT FOR OPTICAL DISK MEDIUM EVALUATING DEVICE
摘要
申请公布号	JPH02185721(A)	申请公布日期	1990.07.20
申请号	JP19890005182	申请日期	1989.01.12
申请人	HITACHI ELECTRON ENG CO LTD	发明人	USAMI MASAKI
分类号	G11B7/26;G11B7/09	主分类号	G11B7/26
代理机构		代理人
主权项
地址

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