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Masumi Ohta
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Tokyo, JP
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last 30 patents
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Patent Grant
Magneto-optical medium and recording and/or reproducing apparatus t...
Patent number
5,579,294
Issue date
Nov 26, 1996
Sony Corporation
Masumi Ohta
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical recording apparatus
Patent number
5,513,167
Issue date
Apr 30, 1996
Sony Corporation
Toshiki Udagawa
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Information
Patent Grant
Optical recording medium
Patent number
5,380,573
Issue date
Jan 10, 1995
Sony Corporation
Atsushi Fukumoto
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Information
Patent Grant
Magneto-optical recording medium
Patent number
5,265,074
Issue date
Nov 23, 1993
Sony Corporation
Masumi Ohta
G11 - INFORMATION STORAGE
Information
Patent Grant
System and method of reproducing signals recorded on a magneto-opti...
Patent number
5,241,520
Issue date
Aug 31, 1993
Sony Corporation
Masumi Ohta
G11 - INFORMATION STORAGE
Information
Patent Grant
Method of fabricating a high-density magnetooptic recording medium
Patent number
5,230,930
Issue date
Jul 27, 1993
Sony Corporation
Katsuhisa Aratani
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Information
Patent Grant
Magneto-optical recording medium and method for reproducing signal...
Patent number
5,218,581
Issue date
Jun 8, 1993
Sony Corporation
Masumi Ohta
G11 - INFORMATION STORAGE
Information
Patent Grant
Magnetooptical recording and playback method employing multi-layer...
Patent number
5,168,482
Issue date
Dec 1, 1992
Sony Corporation
Katsuhisa Aratani
G11 - INFORMATION STORAGE