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Method for heating pulps
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Patent number 6,491,787
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Issue date Dec 10, 2002
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Andritz Oy
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Kari Peltonen
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D21 - PAPER-MAKING PRODUCTION OF CELLULOSE
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Centrifugal pump
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Patent number 5,152,663
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Issue date Oct 6, 1992
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A. Ahlstrom Corporation
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Tapio Peroaho
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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Combined centrifugal and vacuum pump
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Patent number 5,151,010
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Issue date Sep 29, 1992
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A. Ahlstrom Corporation
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Reijo Vesala
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Centrifugal pumping apparatus
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Patent number 5,116,198
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Issue date May 26, 1992
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Ahlstrom Corporation
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Reijo Vesala
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Centrifugal pump with sealing means
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Patent number 5,114,310
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Issue date May 19, 1992
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A. Ahlstrom Corporation
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Harold Haavik
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Fluidizing centrifugal pump
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Patent number 4,877,368
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Issue date Oct 31, 1989
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A. Ahlstrom Corporation
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Jukka Timperi
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...