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Filter bed clarifier
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Patent number 4,871,459
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Issue date Oct 3, 1989
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A. Ahlstrom Corporation
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Juha S. Titoff
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D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
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Floating bed reactor
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Patent number 4,612,115
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Issue date Sep 16, 1986
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Enso-Gutzeit Oy
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Juha Titoff
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Lime sludge press unit
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Patent number 4,324,659
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Issue date Apr 13, 1982
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Enso-Gutzeit Osakehito
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Juha Titoff
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D21 - PAPER-MAKING PRODUCTION OF CELLULOSE