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Two-stage condenser
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Patent number 5,231,836
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Issue date Aug 3, 1993
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Inventio Oy
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Risto Saari
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D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
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Method of freezing and separation
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Patent number 5,181,396
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Issue date Jan 26, 1993
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A. Ahlstrom Corporation
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Risto V. J. Saari
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Flash evaporators
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Patent number 4,105,505
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Issue date Aug 8, 1978
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Risto Saari
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE