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Optical disk
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Patent number 5,817,389
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Issue date Oct 6, 1998
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Sony Corporation
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Masumi Ono
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B82 - NANO-TECHNOLOGY
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Optical recording medium
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Patent number 5,432,774
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Issue date Jul 11, 1995
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Sony Corporation
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Atsushi Fukumoto
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G11 - INFORMATION STORAGE
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Optical recording medium
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Patent number 5,380,573
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Issue date Jan 10, 1995
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Sony Corporation
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Atsushi Fukumoto
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G11 - INFORMATION STORAGE
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Optical disk
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Patent number 5,304,440
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Issue date Apr 19, 1994
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Sony Corporation
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Masumi Ono
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G11 - INFORMATION STORAGE