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Yoshitaka Hotta
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Tokyo, JP
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last 30 patents
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Patent Grant
Optical pickup unit and optical disk apparatus having a phase-diffe...
Patent number
8,149,677
Issue date
Apr 3, 2012
Sanyo Electric Co., LTD
Ryoichi Kawasaki
G11 - INFORMATION STORAGE
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last 30 patents
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Patent Application
Optical Pickup Unit and Optical Disk Apparatus
Publication number
20090022032
Publication date
Jan 22, 2009
Sanyo Electric Co., Ltd.
Ryouichi Kawasaki
G11 - INFORMATION STORAGE