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Nobuyuki Oka
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Kanagawa, JP
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Patents Grants
last 30 patents
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Patent Grant
Magneto-optical recording and reproducing apparatus having a laser...
Patent number
5,495,456
Issue date
Feb 27, 1996
Sony Corporation
Nobuyuki Oka
G11 - INFORMATION STORAGE
Information
Patent Grant
Magnetooptical recording apparatus for recording information in a l...
Patent number
5,487,047
Issue date
Jan 23, 1996
Sony Corporation
Nobuyuki Oka
G11 - INFORMATION STORAGE
Information
Patent Grant
Reproducing apparatus which can play multiple types of discs and bi...
Patent number
5,463,602
Issue date
Oct 31, 1995
Sony Corporation
Nobuyuki Oka
G11 - INFORMATION STORAGE
Information
Patent Grant
Magnetic head position control apparatus including drive means resp...
Patent number
5,168,483
Issue date
Dec 1, 1992
Sony Corporation
Nobuyuki Oka
G11 - INFORMATION STORAGE
Information
Patent Grant
Apparatus for generating magnetic field varying in response to an i...
Patent number
5,111,441
Issue date
May 5, 1992
Sony Corporation
Hiroshi Eto
G11 - INFORMATION STORAGE
Information
Patent Grant
Capacitance detection control circuit for positioning a magnetic he...
Patent number
5,095,470
Issue date
Mar 10, 1992
Sony Corporation
Nobuyuki Oka
G11 - INFORMATION STORAGE
Patents Applications
last 30 patents
Information
Patent Application
Optical disk recording and/or reproducing apparatus, and recording...
Publication number
20030161238
Publication date
Aug 28, 2003
Nobuyuki Oka
G11 - INFORMATION STORAGE