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Waste water treatment apparatus
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Patent number 6,007,712
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Issue date Dec 28, 1999
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Kuraray Co., Ltd.
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Eiji Tanaka
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Polyamide copolymers
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Patent number 5,310,827
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Issue date May 10, 1994
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Kuraray Co., Ltd.
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Yukiatsu Komiya
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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Polyamide copolymers
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Patent number 5,093,437
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Issue date Mar 3, 1992
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Kuraray Co., Ltd.
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Yukiatsu Komiya
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...