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Koji Otsuka
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Saitama, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Lighting device
Patent number
8,608,350
Issue date
Dec 17, 2013
Sanken Electric Co., Ltd.
Koji Otsuka
F21 - LIGHTING
Information
Patent Grant
Light emitting device
Patent number
8,089,078
Issue date
Jan 3, 2012
Sanken Electric Co., Ltd.
Hitoshi Murofushi
H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
LED array for microdisplays or like application
Patent number
7,923,738
Issue date
Apr 12, 2011
Sanken Electric Co., Ltd.
Hitoshi Murofushi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Nitride-based semiconductor device with reduced leakage current
Patent number
7,745,850
Issue date
Jun 29, 2010
Sanken Electric Co., Ltd.
Koji Otsuka
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Surface-stabilized semiconductor device
Patent number
7,714,360
Issue date
May 11, 2010
Sanken Electric Co., Ltd.
Koji Otsuka
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
III-V nitride semiconductor device comprising a concave shottky con...
Patent number
7,692,298
Issue date
Apr 6, 2010
Sanken Electric Co., Ltd.
Koji Otsuka
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
LED having a reflector layer of improved contact ohmicity
Patent number
7,675,070
Issue date
Mar 9, 2010
Sanken Electric Co., Ltd.
Hidekazu Aoyagi
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Nitride-based semiconductor device of reduced voltage drop
Patent number
7,675,076
Issue date
Mar 9, 2010
Sanken Electric Co., Ltd.
Koji Otsuka
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Nitride-based semiconductor device of reduced voltage drop, and met...
Patent number
7,671,375
Issue date
Mar 2, 2010
Sanken Electric Co., Ltd.
Koji Otsuka
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Nitride semiconductor substrate and semiconductor element built the...
Patent number
7,518,154
Issue date
Apr 14, 2009
Sanken Electric Co., Ltd.
Koji Otsuka
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Nitride-based semiconductor device of reduced current leakage
Patent number
7,491,983
Issue date
Feb 17, 2009
Sanken Electric Co., Ltd.
Koji Otsuka
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Light-emitting semiconductor device
Patent number
7,456,435
Issue date
Nov 25, 2008
Sanken Electric Co., Ltd.
Hidekazu Aoyagi
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Nitride-based semiconductor device
Patent number
7,400,000
Issue date
Jul 15, 2008
Sanken Electric Co., Ltd.
Koji Otsuka
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Method of making substrates for nitride semiconductor devices
Patent number
7,186,620
Issue date
Mar 6, 2007
Sanken Electric Co., Ltd.
Koji Otsuka
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Light-emitting semiconductor device with a built-in overvoltage pro...
Patent number
7,173,311
Issue date
Feb 6, 2007
Sanken Electric Co., Ltd.
Junji Sato
H01 - BASIC ELECTRIC ELEMENTS
Patents Applications
last 30 patents
Information
Patent Application
LIGHTING DEVICE
Publication number
20120063141
Publication date
Mar 15, 2012
Sanken Electric Co., Ltd
Koji Otsuka
G02 - OPTICS
Information
Patent Application
LIGHT EMITTING DEVICE
Publication number
20090242910
Publication date
Oct 1, 2009
Sanken Electric Co., Ltd
Hitoshi MUROFUSHI
H05 - ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
Information
Patent Application
LED ARRAY FOR MICRODISPLAYS OR LIKE APPLICATIONS, AND METHOD OF FAB...
Publication number
20090121237
Publication date
May 14, 2009
Sanken Electric Co., Ltd.
Hitoshi Murofushi
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Application
SURFACE-STABILIZED SEMICONDUCTOR DEVICE
Publication number
20080121876
Publication date
May 29, 2008
Sanken Electric Co., Ltd
Koji Otsuka
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
LED HAVING A REFLECTOR LAYER OF IMPROVED CONTACT OHMICITY AND METHO...
Publication number
20070102711
Publication date
May 10, 2007
Sanken Electric Co., Ltd
Hidekazu Aoyagi
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Semiconductor device
Publication number
20070051938
Publication date
Mar 8, 2007
Sanken Electric Co., Ltd.
Koji Otsuka
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Method of fabricating light-emitting semiconductor device
Publication number
20060275937
Publication date
Dec 7, 2006
Sanken Electric Co., Ltd.
Hidekazu Aoyagi
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Nitride-based semiconductor device of reduced voltage drop, and met...
Publication number
20060175628
Publication date
Aug 10, 2006
Sanken Electric Co., Ltd
Koji Otsuka
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Nitride-based semiconductor device of reduced voltage drop
Publication number
20060157730
Publication date
Jul 20, 2006
Sanken Electric Co., Ltd
Koji Otsuka
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Nitride-based semiconductor device of reduced current leakage
Publication number
20060138457
Publication date
Jun 29, 2006
Sanken Electric Co., Ltd
Koji Otsuka
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Semiconductor device with reduced leakage current, and method of fa...
Publication number
20060118824
Publication date
Jun 8, 2006
Sanken Electric Co., Ltd
Koji Otsuka
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Semiconductor light-emitting device, method for manufacturing same,...
Publication number
20060113544
Publication date
Jun 1, 2006
Koji Otsuka
F21 - LIGHTING
Information
Patent Application
Nitride-based semiconductor device and method of fabrication
Publication number
20060094145
Publication date
May 4, 2006
Sanken Electric Co., Ltd
Koji Otsuka
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Light-emitting semiconductor device with a built-in overvoltage pro...
Publication number
20050168899
Publication date
Aug 4, 2005
Sanken Electric Co., Ltd.
Junji Sato
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Method of making substrates for nitride semiconductor devices
Publication number
20050118752
Publication date
Jun 2, 2005
Koji Otsuka
C30 - CRYSTAL GROWTH
Information
Patent Application
Light-emitting semiconductor device and method of fabrication
Publication number
20050110029
Publication date
May 26, 2005
Hidekazu Aoyagi
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Application
Nitride semiconductor substrate, method of fabrication thereof, and...
Publication number
20050110043
Publication date
May 26, 2005
Sanken Electric Co., Ltd.
Koji Otsuka
H01 - BASIC ELECTRIC ELEMENTS