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Katsumi Kohno
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Miyagi, JP
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last 30 patents
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Patent Grant
Optical information record medium
Patent number
5,993,971
Issue date
Nov 30, 1999
Sony Corporation
Keiichi Nito
G11 - INFORMATION STORAGE
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Patent Grant
Optical information record medium
Patent number
4,798,767
Issue date
Jan 17, 1989
Sony Corporation
Tokuei Aoki
C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...