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Heat transfer system
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Patent number 4,371,032
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Issue date Feb 1, 1983
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Horace J. Buttner
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F28 - HEAT EXCHANGE IN GENERAL
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1408827
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Patent number 1,408,827
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Issue date Mar 7, 1922
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A23 - FOODS OR FOODSTUFFS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
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1211252
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Patent number 1,211,252
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Issue date Jan 2, 1917
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A23 - FOODS OR FOODSTUFFS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
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577733
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Patent number 577,733
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Issue date Feb 23, 1897
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A23 - FOODS OR FOODSTUFFS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
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476518
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Patent number 476,518
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Issue date Jun 7, 1892
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A23 - FOODS OR FOODSTUFFS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES