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2585736
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Patent number 2,585,736
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F28 - HEAT EXCHANGE IN GENERAL
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1783641
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F28 - HEAT EXCHANGE IN GENERAL
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1662390
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A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
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1280294
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Patent number 1,280,294
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Issue date Oct 1, 1918
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F28 - HEAT EXCHANGE IN GENERAL
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1010563
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Patent number 1,010,563
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F28 - HEAT EXCHANGE IN GENERAL
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1003826
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Patent number 1,003,826
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F28 - HEAT EXCHANGE IN GENERAL
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961275
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Patent number 961,275
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F28 - HEAT EXCHANGE IN GENERAL
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933927
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Patent number 933,927
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F28 - HEAT EXCHANGE IN GENERAL
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913418
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Patent number 913,418
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F28 - HEAT EXCHANGE IN GENERAL
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879105
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Patent number 879,105
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F28 - HEAT EXCHANGE IN GENERAL
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828314
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Patent number 828,314
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F28 - HEAT EXCHANGE IN GENERAL
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827708
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Patent number 827,708
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F28 - HEAT EXCHANGE IN GENERAL
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809125
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Patent number 809,125
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F28 - HEAT EXCHANGE IN GENERAL
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526239
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Patent number 526,239
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F28 - HEAT EXCHANGE IN GENERAL
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506057
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F28 - HEAT EXCHANGE IN GENERAL
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327067
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F28 - HEAT EXCHANGE IN GENERAL
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224421
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F28 - HEAT EXCHANGE IN GENERAL
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193177
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F28 - HEAT EXCHANGE IN GENERAL
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113438
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F28 - HEAT EXCHANGE IN GENERAL
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F28 - HEAT EXCHANGE IN GENERAL
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85330
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F28 - HEAT EXCHANGE IN GENERAL