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Aqueous ink composition for ball-point pen
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Patent number 5,741,354
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Issue date Apr 21, 1998
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Sakura Color Products Corporation
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Toshimitsu Kawasumi
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C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
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Aqueous ball point ink composition
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Patent number 5,712,328
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Issue date Jan 27, 1998
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Sakura Color Products Corporation
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Shigeyasu Inoue
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C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
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Aqueous ink composition
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Patent number 5,547,499
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Issue date Aug 20, 1996
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Sakura Color Products Corporation
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Toshimitsu Kawasumi
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C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
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Aqueous ink composition for ball-point pen
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Patent number 5,522,920
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Issue date Jun 4, 1996
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Sakura Color Products Corporation
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Toshimitsu Kawasumi
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C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...