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Hajime Koyanagi
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Tsurugashima-shi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Optical pickup device with focus error detecting optical element an...
Patent number
6,967,908
Issue date
Nov 22, 2005
Pioneer Corporation
Masakazu Ogasawara
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical pickup
Patent number
6,442,125
Issue date
Aug 27, 2002
Pioneer Electronic Corporation
Takanori Maeda
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical pickup and optical disk drive for use with a high-density o...
Patent number
6,370,092
Issue date
Apr 9, 2002
Pioneer Electronic Corporation
Yoshitsugu Araki
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical pickup apparatus with a crosstalk balance detecting circuit
Patent number
5,889,752
Issue date
Mar 30, 1999
Pioneer Electronic Corporation
Takanori Maeda
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical pickup device for eliminating unwanted data
Patent number
5,784,345
Issue date
Jul 21, 1998
Pioneer Electronic Corporation
Takanori Maeda
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical pickup device with three beam tracking servo control using...
Patent number
5,633,844
Issue date
May 27, 1997
Pioneer Electronic Corporation
Takanori Maeda
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical disk information recording apparatus and reproducing appara...
Patent number
5,572,493
Issue date
Nov 5, 1996
Pioneer Electronic Corporation
Takanori Maeda
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical disk information recording apparatus and reproducing appara...
Patent number
5,457,670
Issue date
Oct 10, 1995
Pioneer Electronic Corporation
Takanori Maeda
G11 - INFORMATION STORAGE
Patents Applications
last 30 patents
Information
Patent Application
DETECTION DEVICE, METHOD OF DETECTING DISTANCE TO OBJECT, PROGRAM,...
Publication number
20190377070
Publication date
Dec 12, 2019
PIONEER CORPORATION
Shogo MIYANABE
G01 - MEASURING TESTING
Information
Patent Application
SENSOR DEVICE, SENSING METHOD, PROGRAM, AND STORAGE MEDIUM
Publication number
20190265357
Publication date
Aug 29, 2019
PIONEER CORPORATION
Takehiro MATSUDA
G01 - MEASURING TESTING
Information
Patent Application
Optical pickup device and focus error detecting method therefor
Publication number
20020048233
Publication date
Apr 25, 2002
Masakazu Ogasawara
G11 - INFORMATION STORAGE
Information
Patent Application
Pickup device
Publication number
20020034108
Publication date
Mar 21, 2002
Masakazu Ogasawara
G11 - INFORMATION STORAGE