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Heat exchangers
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Patent number 5,101,893
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Issue date Apr 7, 1992
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NNC Limited
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Roy Bilsborough
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F28 - HEAT EXCHANGE IN GENERAL
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Ceramic heat exchangers
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Patent number 4,768,586
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Issue date Sep 6, 1988
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The Babcock & Wilcox Company
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Philip L. Berneburg
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F28 - HEAT EXCHANGE IN GENERAL
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3814178
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Patent number 3,814,178
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Issue date Jun 4, 1974
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F28 - HEAT EXCHANGE IN GENERAL
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3786862
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Patent number 3,786,862
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Issue date Jan 22, 1974
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F28 - HEAT EXCHANGE IN GENERAL
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3667541
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Patent number 3,667,541
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Issue date Jun 6, 1972
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F28 - HEAT EXCHANGE IN GENERAL
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3656544
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Patent number 3,656,544
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Issue date Apr 18, 1972
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F28 - HEAT EXCHANGE IN GENERAL
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3656543
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Patent number 3,656,543
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Issue date Apr 18, 1972
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F28 - HEAT EXCHANGE IN GENERAL
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3605880
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Patent number 3,605,880
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Issue date Sep 20, 1971
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F28 - HEAT EXCHANGE IN GENERAL
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2833526
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Patent number 2,833,526
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Issue date May 6, 1958
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F22 - STEAM GENERATION
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2254189
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Patent number 2,254,189
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Issue date Aug 26, 1941
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F28 - HEAT EXCHANGE IN GENERAL
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2223319
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Patent number 2,223,319
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Issue date Nov 26, 1940
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F28 - HEAT EXCHANGE IN GENERAL
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2202493
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Patent number 2,202,493
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Issue date May 28, 1940
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F28 - HEAT EXCHANGE IN GENERAL
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2174448
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Patent number 2,174,448
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Issue date Sep 26, 1939
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F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
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1961792
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Patent number 1,961,792
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Issue date Jun 5, 1934
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F28 - HEAT EXCHANGE IN GENERAL
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1946234
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Patent number 1,946,234
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Issue date Feb 6, 1934
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F28 - HEAT EXCHANGE IN GENERAL
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1768222
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Patent number 1,768,222
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Issue date Jun 24, 1930
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F28 - HEAT EXCHANGE IN GENERAL
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1435570
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Patent number 1,435,570
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Issue date Nov 14, 1922
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F24 - HEATING RANGES VENTILATING
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1096273
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Patent number 1,096,273
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Issue date May 12, 1914
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F28 - HEAT EXCHANGE IN GENERAL
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1091369
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Patent number 1,091,369
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Issue date Mar 24, 1914
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F28 - HEAT EXCHANGE IN GENERAL
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810670
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Patent number 810,670
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Issue date Jan 23, 1906
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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542890
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Patent number 542,890
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Issue date Jul 16, 1895
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F28 - HEAT EXCHANGE IN GENERAL
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489524
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Patent number 489,524
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Issue date Jan 10, 1893
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F28 - HEAT EXCHANGE IN GENERAL
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367839
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Patent number 367,839
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Issue date Aug 9, 1887
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F28 - HEAT EXCHANGE IN GENERAL
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362395
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Patent number 362,395
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Issue date May 3, 1887
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F28 - HEAT EXCHANGE IN GENERAL
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324120
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Patent number 324,120
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Issue date Aug 11, 1885
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F28 - HEAT EXCHANGE IN GENERAL
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311839
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Patent number 311,839
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Issue date Feb 3, 1885
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F28 - HEAT EXCHANGE IN GENERAL
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290015
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Patent number 290,015
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Issue date Dec 11, 1883
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F28 - HEAT EXCHANGE IN GENERAL
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211051
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Patent number 211,051
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Issue date Dec 17, 1878
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F28 - HEAT EXCHANGE IN GENERAL