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Katsuhiko Ohtomo
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Miyagi, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Record medium, its manufacturing method, mother disc for record med...
Patent number
8,154,981
Issue date
Apr 10, 2012
Sony Corporation
Sohmei Endoh
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical recording medium with grooves, optical recording medium mas...
Patent number
6,975,578
Issue date
Dec 13, 2005
Sony Corporation
Sohmei Endoh
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical recording medium capable of assuring sufficient levels of s...
Patent number
6,487,164
Issue date
Nov 26, 2002
Sony Corporation
Sohmei Endoh
G11 - INFORMATION STORAGE
Information
Patent Grant
High density recording medium with pit width to track pitch ratio i...
Patent number
6,349,085
Issue date
Feb 19, 2002
Sony Corporation
Sohmei Endoh
G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information
Patent Grant
Optical recording medium having a specified range of pit widths and...
Patent number
5,838,654
Issue date
Nov 17, 1998
Sony Corporation
Masaki Kagawa
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical recording medium having a specified range of pit widths and...
Patent number
5,822,294
Issue date
Oct 13, 1998
Sony Corporation
Katsuhiko Ohtomo
G11 - INFORMATION STORAGE
Information
Patent Grant
Base for optical recording medium and stamper for manufacturing bas...
Patent number
5,763,037
Issue date
Jun 9, 1998
Sony Corporation
Katsuhiko Ohtomo
B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information
Patent Grant
Method of measuring a deviation between a centerline between groove...
Patent number
5,715,223
Issue date
Feb 3, 1998
Sony Corporation
Katsuhiko Ohtomo
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical disc having buffering areas capable of storing a pattern fo...
Patent number
5,663,946
Issue date
Sep 2, 1997
Sony Corporation
Katsuhiko Ohtomo
G11 - INFORMATION STORAGE
Information
Patent Grant
Recording and reproducing apparatus and recording and reproducing m...
Patent number
5,661,706
Issue date
Aug 26, 1997
Sony Corporation
Katsuhiko Ohtomo
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical disk having wobbled, discontinuous grooves
Patent number
5,539,724
Issue date
Jul 23, 1996
Sony Corporation
Katsuhiko Ohtomo
G11 - INFORMATION STORAGE
Patents Applications
last 30 patents
Information
Patent Application
RECORD MEDIUM, ITS MANUFACTURING METHOD, MOTHER DISC FOR RECORD MED...
Publication number
20090129252
Publication date
May 21, 2009
SONY CORPORATION
Sohmei Endoh
G11 - INFORMATION STORAGE
Information
Patent Application
Optical record medium, optical record medium matrix, apparatus for...
Publication number
20040114487
Publication date
Jun 17, 2004
Sohmei Endoh
G11 - INFORMATION STORAGE