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956122
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Patent number 956,122
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Issue date Apr 26, 1910
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F28 - HEAT EXCHANGE IN GENERAL
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910083
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Patent number 910,083
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Issue date Jan 19, 1909
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F28 - HEAT EXCHANGE IN GENERAL
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872222
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Patent number 872,222
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Issue date Nov 26, 1907
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F28 - HEAT EXCHANGE IN GENERAL
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782282
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Patent number 782,282
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Issue date Feb 14, 1905
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F28 - HEAT EXCHANGE IN GENERAL
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738915
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Patent number 738,915
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Issue date Sep 15, 1903
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F28 - HEAT EXCHANGE IN GENERAL
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299860
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Patent number 299,860
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Issue date Jun 3, 1884
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F28 - HEAT EXCHANGE IN GENERAL