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Noriyoshi Ooyama
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Gunma, JP
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Patents Grants
last 30 patents
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Patent Grant
Optical pickup apparatus
Patent number
7,672,202
Issue date
Mar 2, 2010
Sanyo Electric Co., LTD
Tohru Hotta
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical device for reading and writing data on a recording medium
Patent number
5,136,565
Issue date
Aug 4, 1992
Sanyo Electric Co., Ltd.
Noriyoshi Ooyama
G11 - INFORMATION STORAGE
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Patent Grant
Optical pickup device wherein the astigmatic converged beam spot is...
Patent number
4,767,921
Issue date
Aug 30, 1988
Sanyo Electric Co., Ltd.
Ryoichi Kawasaki
G11 - INFORMATION STORAGE
Patents Applications
last 30 patents
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Patent Application
OPTICAL PICKUP APPARATUS
Publication number
20070127349
Publication date
Jun 7, 2007
Sanyo Electric Co., Ltd.
Tohru Hotta
G11 - INFORMATION STORAGE