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经营范围
发明名称
Optical head and optical information recording and playback apparatus
摘要
申请公布号
EP1148481(A3)
申请公布日期
2004.01.07
申请号
EP20010250137
申请日期
2001.04.20
申请人
NEC CORPORATION
发明人
KATAYAMA, RYUICHI
分类号
G11B7/007;G11B7/095;G11B7/125;G11B7/13;G11B7/135;G11B11/105;(IPC1-7):G11B7/095
主分类号
G11B7/007
代理机构
代理人
主权项
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