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-
-
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3897819
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Patent number 3,897,819
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Issue date Aug 5, 1975
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F28 - HEAT EXCHANGE IN GENERAL
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3719226
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Patent number 3,719,226
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Issue date Mar 6, 1973
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F28 - HEAT EXCHANGE IN GENERAL
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3596709
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Patent number 3,596,709
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Issue date Aug 3, 1971
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F24 - HEATING RANGES VENTILATING
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3532157
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Patent number 3,532,157
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Issue date Oct 6, 1970
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F28 - HEAT EXCHANGE IN GENERAL
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3446271
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Patent number 3,446,271
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Issue date May 27, 1969
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F28 - HEAT EXCHANGE IN GENERAL
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3382915
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Patent number 3,382,915
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Issue date May 14, 1968
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F28 - HEAT EXCHANGE IN GENERAL
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3380514
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Patent number 3,380,514
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Issue date Apr 30, 1968
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F28 - HEAT EXCHANGE IN GENERAL
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3351127
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Patent number 3,351,127
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Issue date Nov 7, 1967
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F28 - HEAT EXCHANGE IN GENERAL
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3298428
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Patent number 3,298,428
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Issue date Jan 17, 1967
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F28 - HEAT EXCHANGE IN GENERAL
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3190350
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Patent number 3,190,350
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Issue date Jun 22, 1965
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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3190351
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Patent number 3,190,351
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Issue date Jun 22, 1965
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F28 - HEAT EXCHANGE IN GENERAL
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3116785
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Patent number 3,116,785
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Issue date Jan 7, 1964
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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3010704
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Patent number 3,010,704
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Issue date Nov 28, 1961
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F28 - HEAT EXCHANGE IN GENERAL
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3000617
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Patent number 3,000,617
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Issue date Sep 19, 1961
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F28 - HEAT EXCHANGE IN GENERAL
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2965361
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Patent number 2,965,361
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Issue date Dec 20, 1960
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F28 - HEAT EXCHANGE IN GENERAL
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2932492
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Patent number 2,932,492
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Issue date Apr 12, 1960
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F28 - HEAT EXCHANGE IN GENERAL
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2821367
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Patent number 2,821,367
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Issue date Jan 28, 1958
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F28 - HEAT EXCHANGE IN GENERAL
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2766970
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Patent number 2,766,970
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Issue date Oct 16, 1956
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F28 - HEAT EXCHANGE IN GENERAL
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2761654
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Patent number 2,761,654
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Issue date Sep 4, 1956
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F28 - HEAT EXCHANGE IN GENERAL
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2740614
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Patent number 2,740,614
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Issue date Apr 3, 1956
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F28 - HEAT EXCHANGE IN GENERAL
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2708106
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Patent number 2,708,106
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Issue date May 10, 1955
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F28 - HEAT EXCHANGE IN GENERAL
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2692760
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Patent number 2,692,760
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Issue date Oct 26, 1954
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F28 - HEAT EXCHANGE IN GENERAL
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2684230
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Patent number 2,684,230
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Issue date Jul 20, 1954
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F28 - HEAT EXCHANGE IN GENERAL
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2681208
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Patent number 2,681,208
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Issue date Jun 15, 1954
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F28 - HEAT EXCHANGE IN GENERAL
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2631870
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Patent number 2,631,870
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Issue date Mar 17, 1953
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F28 - HEAT EXCHANGE IN GENERAL
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2517512
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Patent number 2,517,512
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Issue date Aug 1, 1950
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F28 - HEAT EXCHANGE IN GENERAL