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Disc cassette
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Patent number 6,522,621
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Issue date Feb 18, 2003
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Sony Corporation
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Kiyoshi Ohmori
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G11 - INFORMATION STORAGE
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Disk cartridge
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Patent number 5,850,384
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Issue date Dec 15, 1998
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Sony Corporation
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Kiyoshi Ohmori
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G11 - INFORMATION STORAGE
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Disc drive unit
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Patent number 5,841,752
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Issue date Nov 24, 1998
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Sony Corporation
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Kiyoshi Ohmori
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G11 - INFORMATION STORAGE
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Disc drive unit
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Patent number 5,815,470
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Issue date Sep 29, 1998
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Sony Corporation
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Kiyoshi Ohmori
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G11 - INFORMATION STORAGE
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