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John E. De Veau
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Minnetonka, MN, US
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last 30 patents
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Patent Grant
Aeration propeller and apparatus
Patent number
4,240,990
Issue date
Dec 23, 1980
Aeration Industries, Inc.
Harold G. Inhofer
C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE