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Tetsuji Kawahima
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Kanagawa, JP
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last 30 patents
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Patent Grant
Data recording medium, data recording apparatus and method, and dat...
Patent number
6,804,188
Issue date
Oct 12, 2004
Sony Corporation
Yukio Shishido
G11 - INFORMATION STORAGE
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Patent Grant
Disk having expanded elapsed time information
Patent number
6,657,938
Issue date
Dec 2, 2003
Sony Corporation
Yoichiro Sako
G11 - INFORMATION STORAGE