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last 30 patents
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Patent Grant
Optical disk and manufacturing method of original optical disk
Patent number
6,288,998
Issue date
Sep 11, 2001
Kabushiki Kaisha Toshiba
Kozo Taira
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical disk and method of manufacturing the same
Patent number
6,026,072
Issue date
Feb 15, 2000
Kabushiki Kaisha Toshiba
Kozo Taira
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical disk having a format condition information drive
Patent number
5,959,962
Issue date
Sep 28, 1999
Kabushiki Kaisha Toshiba
Masaaki Matsumaru
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical disk and optical information reproducing apparatus
Patent number
5,809,003
Issue date
Sep 15, 1998
Kabushiki Kaisha Toshiba
Kozo Taira
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical rotation detector including a disk having slits with concav...
Patent number
5,057,685
Issue date
Oct 15, 1991
Kabushiki Kaisha Toshiba
Ryoichi Kurosawa
G01 - MEASURING TESTING