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Toshiya Nagahama
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Kashiba-shi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Splitting element, light emitter, and optical pickup apparatus
Patent number
7,649,825
Issue date
Jan 19, 2010
Sharp Kabushiki Kaisha
Kazuhiro Tsuchida
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical pickup device using polarizing hologram element and hologra...
Patent number
7,483,360
Issue date
Jan 27, 2009
Sharp Kabushiki Kaisha
Katsushige Masui
G11 - INFORMATION STORAGE
Information
Patent Grant
Semiconductor laser device and method for producing the same
Patent number
6,847,665
Issue date
Jan 25, 2005
Sharp Kabushiki Kaisha
Shigehiro Yamada
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Optical pickup device with diffraction device
Patent number
RE35332
Issue date
Sep 24, 1996
Sharp Kabushiki Kaisha
Toshiya Nagahama
250 - Radiant energy
Information
Patent Grant
Optical pickup apparatus
Patent number
5,408,450
Issue date
Apr 18, 1995
Sharp Kabushiki Kaisha
Toshiya Nagahama
G11 - INFORMATION STORAGE
Information
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
Optical pick-up device using diffraction grating element having two...
Patent number
5,111,449
Issue date
May 5, 1992
Sharp Kabushiki Kaisha
Yukio Kurata
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical pickup device with diffraction device
Patent number
5,049,732
Issue date
Sep 17, 1991
Sharp Kabushiki Kaisha
Toshiya Nagahama
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical pickup device with diffraction sensing
Patent number
4,904,856
Issue date
Feb 27, 1990
Sharp Kabushiki Kaisha
Toshiya Nagahama
G11 - INFORMATION STORAGE
Patents Applications
last 30 patents
Information
Patent Application
Split body, light emitting body and optical pickup device
Publication number
20060262695
Publication date
Nov 23, 2006
SHARP KABUSHIKI KAISHA
Kazuhiro Tsuchida
G11 - INFORMATION STORAGE
Information
Patent Application
Optical pickup and hologram laser
Publication number
20050100061
Publication date
May 12, 2005
Katsushige Masui
G11 - INFORMATION STORAGE
Information
Patent Application
Semiconductor laser device and method for producing the same
Publication number
20020141465
Publication date
Oct 3, 2002
Shigehiro Yamada
H01 - BASIC ELECTRIC ELEMENTS