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-
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3424234
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Patent number 3,424,234
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Issue date Jan 28, 1969
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F28 - HEAT EXCHANGE IN GENERAL
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2787986
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Patent number 2,787,986
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Issue date Apr 9, 1957
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F28 - HEAT EXCHANGE IN GENERAL
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2151791
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Patent number 2,151,791
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Issue date Mar 28, 1939
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F28 - HEAT EXCHANGE IN GENERAL
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2066661
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Patent number 2,066,661
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Issue date Jan 5, 1937
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F28 - HEAT EXCHANGE IN GENERAL
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1903471
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Patent number 1,903,471
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Issue date Apr 4, 1933
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F28 - HEAT EXCHANGE IN GENERAL
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1858226
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Patent number 1,858,226
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Issue date May 10, 1932
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F28 - HEAT EXCHANGE IN GENERAL
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1739314
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Patent number 1,739,314
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Issue date Dec 10, 1929
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F28 - HEAT EXCHANGE IN GENERAL
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1458321
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Patent number 1,458,321
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Issue date Jun 12, 1923
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F28 - HEAT EXCHANGE IN GENERAL
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1454315
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Patent number 1,454,315
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Issue date May 8, 1923
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F28 - HEAT EXCHANGE IN GENERAL
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1421221
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Patent number 1,421,221
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Issue date Jun 27, 1922
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F28 - HEAT EXCHANGE IN GENERAL
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1417027
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Patent number 1,417,027
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Issue date May 23, 1922
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F28 - HEAT EXCHANGE IN GENERAL
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1417028
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Patent number 1,417,028
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Issue date May 23, 1922
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F28 - HEAT EXCHANGE IN GENERAL
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1417037
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Patent number 1,417,037
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Issue date May 23, 1922
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F28 - HEAT EXCHANGE IN GENERAL
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1404095
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Patent number 1,404,095
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Issue date Jan 17, 1922
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F28 - HEAT EXCHANGE IN GENERAL