OPTICAL PICKUP SYSTEM,申请号JP19870234381-传众专利搜索

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发明名称	OPTICAL PICKUP SYSTEM
摘要
申请公布号	JPS6476556(A)	申请公布日期	1989.03.22
申请号	JP19870234381	申请日期	1987.09.18
申请人	ALPINE ELECTRON INC	发明人	KATSUNUMA TETSUO
分类号	G11B7/085;G11B19/247;G11B19/28	主分类号	G11B7/085
代理机构		代理人
主权项
地址

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MAGNETIC MEDIUM AND METHOD OF MANUFACTURING THE SAME