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Surface aeration impellers
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Patent number 6,877,959
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Issue date Apr 12, 2005
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Mixing & Mass Transfer Technologies, LLC
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John R. McWhirter
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Surface aeration impeller designs
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Patent number 6,860,631
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Issue date Mar 1, 2005
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The Penn State Research Foundation
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John R. McWhirter
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C12 - BIOCHEMISTRY BEER SPIRITS WINE VINEGAR MICROBIOLOGY ENZYMOLOGY MUTATION...
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Surface aeration impellers
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Patent number 6,715,912
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Issue date Apr 6, 2004
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The Penn State Research Foundation
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John R. McWhirter
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C12 - BIOCHEMISTRY BEER SPIRITS WINE VINEGAR MICROBIOLOGY ENZYMOLOGY MUTATION...