-
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1780781
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Patent number 1,780,781
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Issue date Nov 4, 1930
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F28 - HEAT EXCHANGE IN GENERAL
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1711332
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Patent number 1,711,332
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Issue date Apr 30, 1929
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F28 - HEAT EXCHANGE IN GENERAL
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1700106
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Patent number 1,700,106
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Issue date Jan 22, 1929
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F28 - HEAT EXCHANGE IN GENERAL
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1626849
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Patent number 1,626,849
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Issue date May 3, 1927
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F28 - HEAT EXCHANGE IN GENERAL
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1616610
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Patent number 1,616,610
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Issue date Feb 8, 1927
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F28 - HEAT EXCHANGE IN GENERAL
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1594169
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Patent number 1,594,169
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Issue date Jul 27, 1926
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F28 - HEAT EXCHANGE IN GENERAL
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1578002
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Patent number 1,578,002
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Issue date Mar 23, 1926
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F28 - HEAT EXCHANGE IN GENERAL
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1578058
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Patent number 1,578,058
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Issue date Mar 23, 1926
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F28 - HEAT EXCHANGE IN GENERAL
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1573871
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Patent number 1,573,871
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Issue date Feb 23, 1926
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F28 - HEAT EXCHANGE IN GENERAL
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1483599
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Patent number 1,483,599
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Issue date Feb 12, 1924
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F28 - HEAT EXCHANGE IN GENERAL
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1407137
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Patent number 1,407,137
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Issue date Feb 21, 1922
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F28 - HEAT EXCHANGE IN GENERAL
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1352440
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Patent number 1,352,440
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Issue date Sep 14, 1920
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F28 - HEAT EXCHANGE IN GENERAL
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1350320
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Patent number 1,350,320
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Issue date Aug 24, 1920
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F22 - STEAM GENERATION
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1264195
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Patent number 1,264,195
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Issue date Apr 30, 1918
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F28 - HEAT EXCHANGE IN GENERAL
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1233138
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Patent number 1,233,138
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Issue date Jul 10, 1917
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F28 - HEAT EXCHANGE IN GENERAL
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1114333
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Patent number 1,114,333
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Issue date Oct 20, 1914
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F28 - HEAT EXCHANGE IN GENERAL
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956210
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Patent number 956,210
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Issue date Apr 26, 1910
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F28 - HEAT EXCHANGE IN GENERAL
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946238
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Patent number 946,238
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Issue date Jan 11, 1910
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F28 - HEAT EXCHANGE IN GENERAL