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Flash boiler
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Patent number 10,928,058
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Issue date Feb 23, 2021
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Guy Louis Letourneau
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F22 - STEAM GENERATION
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Hot water boiler
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Patent number 10,281,139
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Issue date May 7, 2019
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Junggon Kim
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F24 - HEATING RANGES VENTILATING
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-
-
-
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Hot water or steam boiler
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Patent number 4,171,685
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Issue date Oct 23, 1979
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Osby Varme AB
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Finn U. Ek
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F24 - HEATING RANGES VENTILATING
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Hot water or steam boiler
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Patent number 4,123,995
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Issue date Nov 7, 1978
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Osby, Varme AB
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Finn U. Ek
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F24 - HEATING RANGES VENTILATING
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3409074
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Patent number 3,409,074
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Issue date Nov 5, 1968
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F28 - HEAT EXCHANGE IN GENERAL
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3246633
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Patent number 3,246,633
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Issue date Apr 19, 1966
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F22 - STEAM GENERATION
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3187726
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Patent number 3,187,726
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Issue date Jun 8, 1965
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F24 - HEATING RANGES VENTILATING
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3171388
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Patent number 3,171,388
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Issue date Mar 2, 1965
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F24 - HEATING RANGES VENTILATING
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2993479
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Patent number 2,993,479
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Issue date Jul 25, 1961
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F24 - HEATING RANGES VENTILATING
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2818048
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Patent number 2,818,048
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Issue date Dec 31, 1957
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F22 - STEAM GENERATION
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2749887
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Patent number 2,749,887
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Issue date Jun 12, 1956
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F24 - HEATING RANGES VENTILATING
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2684663
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Patent number 2,684,663
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Issue date Jul 27, 1954
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F22 - STEAM GENERATION
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2681640
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Patent number 2,681,640
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Issue date Jun 22, 1954
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F22 - STEAM GENERATION
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2455621
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Patent number 2,455,621
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Issue date Dec 7, 1948
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F22 - STEAM GENERATION
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2189442
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Patent number 2,189,442
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Issue date Feb 6, 1940
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F22 - STEAM GENERATION
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2183205
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Patent number 2,183,205
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Issue date Dec 12, 1939
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F22 - STEAM GENERATION
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2147378
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Patent number 2,147,378
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Issue date Feb 14, 1939
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F22 - STEAM GENERATION
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2141917
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Patent number 2,141,917
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Issue date Dec 27, 1938
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F22 - STEAM GENERATION
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2090229
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Patent number 2,090,229
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Issue date Aug 17, 1937
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F22 - STEAM GENERATION
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2021823
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Patent number 2,021,823
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Issue date Nov 19, 1935
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F22 - STEAM GENERATION
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2018709
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Patent number 2,018,709
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Issue date Oct 29, 1935
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F22 - STEAM GENERATION
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2011164
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Patent number 2,011,164
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Issue date Aug 13, 1935
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F22 - STEAM GENERATION
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1997934
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Patent number 1,997,934
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Issue date Apr 16, 1935
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F22 - STEAM GENERATION
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1927327
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Patent number 1,927,327
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Issue date Sep 19, 1933
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F22 - STEAM GENERATION
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1870059
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Patent number 1,870,059
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Issue date Aug 2, 1932
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F22 - STEAM GENERATION
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1853183
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Patent number 1,853,183
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Issue date Apr 12, 1932
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F22 - STEAM GENERATION