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Air driven water circulation mill
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Patent number 4,764,313
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Issue date Aug 16, 1988
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Sunset Solar Systems Ltd.
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Douglas Cameron
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F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
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Draft tube apparatus
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Patent number 4,459,030
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Issue date Jul 10, 1984
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General Signal Corporation
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Ronald J. Weetman
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Draft tube apparatus
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Patent number 4,378,165
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Issue date Mar 29, 1983
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General Signal Corporation
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George G. Landberg
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Draft tube apparatus
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Patent number 4,358,206
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Issue date Nov 9, 1982
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General Signal Corporation
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Marlin D. Schutte
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Wind-powered impeller-mixer
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Patent number 4,292,540
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Issue date Sep 29, 1981
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Worthington J. Thompson
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F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
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Energy recovery system
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Patent number 4,237,693
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Issue date Dec 9, 1980
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Imperial Chemical Industries Limited
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Frank P. Maslen
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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3350428
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Patent number 3,350,428
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Issue date Oct 31, 1967
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C07 - ORGANIC CHEMISTRY
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3259645
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Patent number 3,259,645
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Issue date Jul 5, 1966
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C07 - ORGANIC CHEMISTRY
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3257175
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Patent number 3,257,175
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Issue date Jun 21, 1966
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C07 - ORGANIC CHEMISTRY
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2517997
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Patent number 2,517,997
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Issue date Aug 8, 1950
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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1368601
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Patent number 1,368,601
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Issue date Feb 15, 1921
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL