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Koji Yoshifusa
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Higashihiroshima, JP
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last 30 patents
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Patent Grant
Optical pickup device using a holographic optical element and an am...
Patent number
5,272,329
Issue date
Dec 21, 1993
Sharp Kabushiki Kaisha
Toshiya Nagahama
G11 - INFORMATION STORAGE
Information
Patent Grant
Semiconductor chip detecting device for providing focusing and repr...
Patent number
5,049,733
Issue date
Sep 17, 1991
Sharp Kabushiki Kaisha
Koji Yoshifusa
G11 - INFORMATION STORAGE
Information
Patent Grant
Beam converting apparatus with a parallel light beam input and outp...
Patent number
5,007,713
Issue date
Apr 16, 1991
Sharp Kabushiki Kaisha
Koji Yoshifusa
G11 - INFORMATION STORAGE