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Heat exchangers and evaporators
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Patent number 4,119,485
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Issue date Oct 10, 1978
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Austral-Erwin Engineering Company
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Ransome W. Erwin
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F24 - HEATING RANGES VENTILATING
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Heat exchange method
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Patent number 4,082,140
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Issue date Apr 4, 1978
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Austral-Erwin Engineering Company
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Ransome W. Erwin
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F24 - HEATING RANGES VENTILATING
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Heat exchangers and evaporators
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Patent number 3,976,537
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Issue date Aug 24, 1976
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Austral-Erwin Engineering Co.
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Ransome W. Erwin
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F28 - HEAT EXCHANGE IN GENERAL
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Heat engines
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Patent number 3,938,335
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Issue date Feb 17, 1976
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Edward F. Marwick
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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Heat exchangers and evaporators
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Patent number 3,939,036
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Issue date Feb 17, 1976
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Austral-Erwin Engineering Co.
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Ransome W. Erwin
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F28 - HEAT EXCHANGE IN GENERAL
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3925149
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Patent number 3,925,149
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Issue date Dec 9, 1975
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F28 - HEAT EXCHANGE IN GENERAL
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3925148
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Patent number 3,925,148
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Issue date Dec 9, 1975
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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3917508
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Patent number 3,917,508
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Issue date Nov 4, 1975
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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3891496
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Patent number 3,891,496
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Issue date Jun 24, 1975
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F24 - HEATING RANGES VENTILATING
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3856631
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Patent number 3,856,631
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Issue date Dec 24, 1974
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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3855079
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Patent number 3,855,079
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Issue date Dec 17, 1974
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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3755088
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Patent number 3,755,088
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Issue date Aug 28, 1973
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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3741878
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Patent number 3,741,878
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Issue date Jun 26, 1973
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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3734160
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Patent number 3,734,160
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Issue date May 22, 1973
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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3731801
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Patent number 3,731,801
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Issue date May 8, 1973
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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3716458
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Patent number 3,716,458
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Issue date Feb 13, 1973
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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3647638
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Patent number 3,647,638
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Issue date Mar 7, 1972
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C01 - INORGANIC CHEMISTRY
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3640850
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Patent number 3,640,850
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Issue date Feb 8, 1972
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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3634043
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Patent number 3,634,043
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Issue date Jan 11, 1972
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C01 - INORGANIC CHEMISTRY
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3627646
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Patent number 3,627,646
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Issue date Dec 14, 1971
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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3592743
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Patent number 3,592,743
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Issue date Jul 13, 1971
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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3580814
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Patent number 3,580,814
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Issue date May 25, 1971
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C02 - TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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3567591
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Patent number 3,567,591
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Issue date Mar 2, 1971
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...