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-
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2313315
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Patent number 2,313,315
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Issue date Mar 9, 1943
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F28 - HEAT EXCHANGE IN GENERAL
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1673409
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Patent number 1,673,409
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Issue date Jun 12, 1928
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F28 - HEAT EXCHANGE IN GENERAL
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1514047
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Patent number 1,514,047
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Issue date Nov 4, 1924
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F28 - HEAT EXCHANGE IN GENERAL
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1428481
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Patent number 1,428,481
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Issue date Sep 5, 1922
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F28 - HEAT EXCHANGE IN GENERAL
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1301608
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Patent number 1,301,608
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Issue date Apr 22, 1919
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F28 - HEAT EXCHANGE IN GENERAL
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1227770
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Patent number 1,227,770
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Issue date May 29, 1917
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F28 - HEAT EXCHANGE IN GENERAL
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1182271
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Patent number 1,182,271
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Issue date May 9, 1916
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F28 - HEAT EXCHANGE IN GENERAL
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1087899
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Patent number 1,087,899
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Issue date Feb 17, 1914
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F28 - HEAT EXCHANGE IN GENERAL
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989185
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Patent number 989,185
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Issue date Apr 11, 1911
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F28 - HEAT EXCHANGE IN GENERAL
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976147
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Patent number 976,147
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Issue date Nov 22, 1910
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F28 - HEAT EXCHANGE IN GENERAL
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895205
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Patent number 895,205
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Issue date Aug 4, 1908
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F28 - HEAT EXCHANGE IN GENERAL
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877609
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Patent number 877,609
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Issue date Jan 28, 1908
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F28 - HEAT EXCHANGE IN GENERAL
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764727
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Patent number 764,727
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Issue date Jul 12, 1904
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F28 - HEAT EXCHANGE IN GENERAL
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709416
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Patent number 709,416
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Issue date Sep 16, 1902
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F28 - HEAT EXCHANGE IN GENERAL