-
-
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3905420
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Patent number 3,905,420
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Issue date Sep 16, 1975
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F28 - HEAT EXCHANGE IN GENERAL
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3896874
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Patent number 3,896,874
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Issue date Jul 29, 1975
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F28 - HEAT EXCHANGE IN GENERAL
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3835920
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Patent number 3,835,920
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Issue date Sep 17, 1974
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F28 - HEAT EXCHANGE IN GENERAL
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3701381
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Patent number 3,701,381
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Issue date Oct 31, 1972
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F28 - HEAT EXCHANGE IN GENERAL
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3656546
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Patent number 3,656,546
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Issue date Apr 18, 1972
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F22 - STEAM GENERATION
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3386501
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Patent number 3,386,501
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Issue date Jun 4, 1968
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F28 - HEAT EXCHANGE IN GENERAL
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3286767
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Patent number 3,286,767
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Issue date Nov 22, 1966
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F28 - HEAT EXCHANGE IN GENERAL
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3266563
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Patent number 3,266,563
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Issue date Aug 16, 1966
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F24 - HEATING RANGES VENTILATING
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3224502
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Patent number 3,224,502
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Issue date Dec 21, 1965
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F28 - HEAT EXCHANGE IN GENERAL
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3169576
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Patent number 3,169,576
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Issue date Feb 16, 1965
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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3152637
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Patent number 3,152,637
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Issue date Oct 13, 1964
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F24 - HEATING RANGES VENTILATING
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3078919
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Patent number 3,078,919
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Issue date Feb 26, 1963
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C21 - METALLURGY OF IRON
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3045981
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Patent number 3,045,981
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Issue date Jul 24, 1962
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F28 - HEAT EXCHANGE IN GENERAL
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2963276
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Patent number 2,963,276
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Issue date Dec 6, 1960
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F24 - HEATING RANGES VENTILATING
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2750159
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Patent number 2,750,159
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Issue date Jun 12, 1956
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F23 - COMBUSTION APPARATUS COMBUSTION PROCESSES
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2666625
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Patent number 2,666,625
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Issue date Jan 19, 1954
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F22 - STEAM GENERATION
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2225760
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Patent number 2,225,760
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Issue date Dec 24, 1940
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F28 - HEAT EXCHANGE IN GENERAL
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2053780
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Patent number 2,053,780
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Issue date Sep 8, 1936
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F28 - HEAT EXCHANGE IN GENERAL
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1940152
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Patent number 1,940,152
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Issue date Dec 19, 1933
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F28 - HEAT EXCHANGE IN GENERAL
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1903125
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Patent number 1,903,125
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Issue date Mar 28, 1933
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F28 - HEAT EXCHANGE IN GENERAL
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1837442
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Patent number 1,837,442
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Issue date Dec 22, 1931
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F28 - HEAT EXCHANGE IN GENERAL
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1832147
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Patent number 1,832,147
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Issue date Nov 17, 1931
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F28 - HEAT EXCHANGE IN GENERAL
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1818446
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Patent number 1,818,446
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Issue date Aug 11, 1931
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F22 - STEAM GENERATION
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1817948
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Patent number 1,817,948
-
Issue date Aug 11, 1931
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F28 - HEAT EXCHANGE IN GENERAL
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1796944
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Patent number 1,796,944
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Issue date Mar 17, 1931
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F28 - HEAT EXCHANGE IN GENERAL
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1796945
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Patent number 1,796,945
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Issue date Mar 17, 1931
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F28 - HEAT EXCHANGE IN GENERAL
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1790535
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Patent number 1,790,535
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Issue date Jan 27, 1931
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F28 - HEAT EXCHANGE IN GENERAL
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1790241
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Patent number 1,790,241
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Issue date Jan 27, 1931
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F28 - HEAT EXCHANGE IN GENERAL