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Comfort heat exchanger
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Patent number 4,923,004
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Issue date May 8, 1990
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Du Pont Canada, Inc.
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Eldon L. Fletcher
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Heat exchanger
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Patent number 4,546,824
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Issue date Oct 15, 1985
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McCord Heat Transfer Corporation
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William Melnyk
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F28 - HEAT EXCHANGE IN GENERAL
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Header construction
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Patent number 4,381,033
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Issue date Apr 26, 1983
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Karmazin Products Corporation
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Ivan D. Woodhull
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F28 - HEAT EXCHANGE IN GENERAL
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Heat exchanger
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Patent number 3,993,126
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Issue date Nov 23, 1976
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Delanair Limited
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Charles Taylor
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F28 - HEAT EXCHANGE IN GENERAL
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3472316
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Patent number 3,472,316
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Issue date Oct 14, 1969
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F28 - HEAT EXCHANGE IN GENERAL
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3113615
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Patent number 3,113,615
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Issue date Dec 10, 1963
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F28 - HEAT EXCHANGE IN GENERAL
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2930590
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Patent number 2,930,590
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Issue date Mar 29, 1960
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F28 - HEAT EXCHANGE IN GENERAL
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2573161
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Patent number 2,573,161
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Issue date Oct 30, 1951
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F28 - HEAT EXCHANGE IN GENERAL
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1718361
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Patent number 1,718,361
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Issue date Jun 25, 1929
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1372380
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Patent number 1,372,380
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Issue date Mar 22, 1921
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F28 - HEAT EXCHANGE IN GENERAL
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1333668
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Patent number 1,333,668
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Issue date Mar 16, 1920
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F28 - HEAT EXCHANGE IN GENERAL
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1053546
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Patent number 1,053,546
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Issue date Feb 18, 1913
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F28 - HEAT EXCHANGE IN GENERAL