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2650800
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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Patent number 2,210,200
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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1987123
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Patent number 1,987,123
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Issue date Jan 8, 1935
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F28 - HEAT EXCHANGE IN GENERAL
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1380967
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Issue date Jun 7, 1921
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A01 - AGRICULTURE FORESTRY ANIMAL HUSBANDRY HUNTING TRAPPING FISHING
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1230960
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F28 - HEAT EXCHANGE IN GENERAL
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962427
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F28 - HEAT EXCHANGE IN GENERAL
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592041
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F28 - HEAT EXCHANGE IN GENERAL
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444385
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F28 - HEAT EXCHANGE IN GENERAL
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F28 - HEAT EXCHANGE IN GENERAL
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277012
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F28 - HEAT EXCHANGE IN GENERAL
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254077
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F28 - HEAT EXCHANGE IN GENERAL
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218352
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Patent number 218,352
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Issue date Aug 5, 1879
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F28 - HEAT EXCHANGE IN GENERAL