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2880973
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Patent number 2,880,973
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Issue date Apr 7, 1959
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F22 - STEAM GENERATION
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2656821
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Patent number 2,656,821
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Issue date Oct 27, 1953
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F22 - STEAM GENERATION
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2639127
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Patent number 2,639,127
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Issue date May 19, 1953
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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2588310
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Patent number 2,588,310
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Issue date Mar 4, 1952
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F22 - STEAM GENERATION
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2515701
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Patent number 2,515,701
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Issue date Jul 18, 1950
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F22 - STEAM GENERATION
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2458798
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Patent number 2,458,798
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Issue date Jan 11, 1949
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F22 - STEAM GENERATION
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2167659
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Patent number 2,167,659
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Issue date Aug 1, 1939
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F22 - STEAM GENERATION
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2130351
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Patent number 2,130,351
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Issue date Sep 20, 1938
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F22 - STEAM GENERATION
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2099851
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Patent number 2,099,851
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Issue date Nov 23, 1937
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F22 - STEAM GENERATION
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2086786
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Patent number 2,086,786
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Issue date Jul 13, 1937
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F22 - STEAM GENERATION
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2067670
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Patent number 2,067,670
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Issue date Jan 12, 1937
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F22 - STEAM GENERATION
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2064123
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Patent number 2,064,123
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Issue date Dec 15, 1936
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F22 - STEAM GENERATION
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2056245
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Patent number 2,056,245
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Issue date Oct 6, 1936
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F22 - STEAM GENERATION
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2053434
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Patent number 2,053,434
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Issue date Sep 8, 1936
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F22 - STEAM GENERATION
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2037424
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Patent number 2,037,424
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Issue date Apr 14, 1936
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F22 - STEAM GENERATION
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2010672
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Patent number 2,010,672
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Issue date Aug 6, 1935
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F22 - STEAM GENERATION
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1989694
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Patent number 1,989,694
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Issue date Feb 5, 1935
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F22 - STEAM GENERATION
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1969373
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Patent number 1,969,373
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Issue date Aug 7, 1934
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F22 - STEAM GENERATION
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1915807
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Patent number 1,915,807
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Issue date Jun 27, 1933
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F22 - STEAM GENERATION
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1907940
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Patent number 1,907,940
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Issue date May 9, 1933
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F22 - STEAM GENERATION
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1897126
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Patent number 1,897,126
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Issue date Feb 14, 1933
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F22 - STEAM GENERATION
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1886316
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Patent number 1,886,316
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Issue date Nov 1, 1932
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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1883161
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Patent number 1,883,161
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Issue date Oct 18, 1932
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F22 - STEAM GENERATION
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1883371
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Patent number 1,883,371
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Issue date Oct 18, 1932
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F22 - STEAM GENERATION
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1832071
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Patent number 1,832,071
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Issue date Nov 17, 1931
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F22 - STEAM GENERATION
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1821683
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Patent number 1,821,683
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Issue date Sep 1, 1931
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F22 - STEAM GENERATION
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1818402
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Patent number 1,818,402
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Issue date Aug 11, 1931
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F22 - STEAM GENERATION
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1818390
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Patent number 1,818,390
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Issue date Aug 11, 1931
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F22 - STEAM GENERATION
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1809972
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Patent number 1,809,972
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Issue date Jun 16, 1931
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F22 - STEAM GENERATION
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1796604
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Patent number 1,796,604
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Issue date Mar 17, 1931
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F22 - STEAM GENERATION