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Information recording discs
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Patent number 5,448,547
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Issue date Sep 5, 1995
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Mitsui Petrochemical Industries, Ltd.
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Takeshi Minoda
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G11 - INFORMATION STORAGE
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Information recording discs
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Patent number 5,301,183
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Issue date Apr 5, 1994
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Mitsui Petrochemical Industries Ltd.
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Takeshi Minoda
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G11 - INFORMATION STORAGE
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Information recording discs
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Patent number 5,263,016
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Issue date Nov 16, 1993
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Mitsui Petrochemical Industries, Ltd.
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Takeshi Minoda
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G11 - INFORMATION STORAGE
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Optical recording media
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Patent number 5,079,060
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Issue date Jan 7, 1992
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Mitsui Petrochemical Industries, Ltd.
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Hisaharu Toibana
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G11 - INFORMATION STORAGE
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Process for producing magnetic hub
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Patent number 5,020,207
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Issue date Jun 4, 1991
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Mitsui Petrochemical Industries, Ltd.
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Takeshi Minoda
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Optical recording media
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Patent number 4,994,354
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Issue date Feb 19, 1991
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Mitsui Petrochemical Industries, Ltd.
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Hisaharu Toibana
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G11 - INFORMATION STORAGE
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