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Heat exchanger
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Patent number 4,784,219
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Issue date Nov 15, 1988
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Sulzer Brothers Limited
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Georg Hirschle
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F28 - HEAT EXCHANGE IN GENERAL
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Heat exchanger
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Patent number 4,605,059
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Issue date Aug 12, 1986
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Laporte Industries Limited
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Michael J. Page
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F28 - HEAT EXCHANGE IN GENERAL
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Waste-heat tank
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Patent number 4,564,067
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Issue date Jan 14, 1986
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L. & C. Steinmuller GmbH
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Ulrich Premel
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F22 - STEAM GENERATION
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Heat exchanger
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Patent number 4,168,745
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Issue date Sep 25, 1979
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The American Equipment Systems Corporation
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William R. Lastinger
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F24 - HEATING RANGES VENTILATING
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3700030
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Patent number 3,700,030
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Issue date Oct 24, 1972
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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3595309
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Patent number 3,595,309
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Issue date Jul 27, 1971
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F28 - HEAT EXCHANGE IN GENERAL
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3509939
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Patent number 3,509,939
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Issue date May 5, 1970
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F22 - STEAM GENERATION
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3496997
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Patent number 3,496,997
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Issue date Feb 24, 1970
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F28 - HEAT EXCHANGE IN GENERAL
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3379244
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Patent number 3,379,244
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Issue date Apr 23, 1968
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F28 - HEAT EXCHANGE IN GENERAL
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3256932
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Patent number 3,256,932
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Issue date Jun 21, 1966
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F28 - HEAT EXCHANGE IN GENERAL
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2693346
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Patent number 2,693,346
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Issue date Nov 2, 1954
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F28 - HEAT EXCHANGE IN GENERAL
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2530519
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Patent number 2,530,519
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Issue date Nov 21, 1950
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A23 - FOODS OR FOODSTUFFS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
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2508247
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Patent number 2,508,247
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Issue date May 16, 1950
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F28 - HEAT EXCHANGE IN GENERAL
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1915352
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Patent number 1,915,352
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Issue date Jun 27, 1933
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B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
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1852490
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Patent number 1,852,490
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Issue date Apr 5, 1932
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F28 - HEAT EXCHANGE IN GENERAL
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1023402
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Patent number 1,023,402
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Issue date Apr 16, 1912
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F28 - HEAT EXCHANGE IN GENERAL
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291538
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Patent number 291,538
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Issue date Jan 8, 1884
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F28 - HEAT EXCHANGE IN GENERAL