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2458029
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Patent number 2,458,029
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Issue date Jan 4, 1949
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F22 - STEAM GENERATION
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2379217
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Patent number 2,379,217
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Issue date Jun 26, 1945
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F22 - STEAM GENERATION
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2328896
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Patent number 2,328,896
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Issue date Sep 7, 1943
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F22 - STEAM GENERATION
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2325554
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Patent number 2,325,554
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Issue date Jul 27, 1943
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F22 - STEAM GENERATION
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2240372
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Patent number 2,240,372
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Issue date Apr 29, 1941
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F22 - STEAM GENERATION
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2229136
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Patent number 2,229,136
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Issue date Jan 21, 1941
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F22 - STEAM GENERATION
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2186904
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Patent number 2,186,904
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Issue date Jan 9, 1940
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F22 - STEAM GENERATION
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2167090
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Patent number 2,167,090
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Issue date Jul 25, 1939
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F22 - STEAM GENERATION
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2148025
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Patent number 2,148,025
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Issue date Feb 21, 1939
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F22 - STEAM GENERATION
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2110334
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Patent number 2,110,334
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Issue date Mar 8, 1938
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F22 - STEAM GENERATION
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2079104
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Patent number 2,079,104
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Issue date May 4, 1937
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F22 - STEAM GENERATION
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2075067
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Patent number 2,075,067
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Issue date Mar 30, 1937
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F22 - STEAM GENERATION
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2072674
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Patent number 2,072,674
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Issue date Mar 2, 1937
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F22 - STEAM GENERATION
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2068412
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Patent number 2,068,412
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Issue date Jan 19, 1937
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F22 - STEAM GENERATION
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2032445
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Patent number 2,032,445
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Issue date Mar 3, 1936
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F22 - STEAM GENERATION
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2032413
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Patent number 2,032,413
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Issue date Mar 3, 1936
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F22 - STEAM GENERATION
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2019606
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Patent number 2,019,606
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Issue date Nov 5, 1935
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F22 - STEAM GENERATION
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2009961
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Patent number 2,009,961
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Issue date Jul 30, 1935
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F22 - STEAM GENERATION
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2003838
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Patent number 2,003,838
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Issue date Jun 4, 1935
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F22 - STEAM GENERATION
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1996134
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Patent number 1,996,134
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Issue date Apr 2, 1935
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F22 - STEAM GENERATION
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1990073
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Patent number 1,990,073
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Issue date Feb 5, 1935
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F22 - STEAM GENERATION
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1986336
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Patent number 1,986,336
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Issue date Jan 1, 1935
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F22 - STEAM GENERATION
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1965067
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Patent number 1,965,067
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Issue date Jul 3, 1934
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F22 - STEAM GENERATION
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1963740
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Patent number 1,963,740
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Issue date Jun 19, 1934
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F22 - STEAM GENERATION
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1942676
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Patent number 1,942,676
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Issue date Jan 9, 1934
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F22 - STEAM GENERATION
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1940715
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Patent number 1,940,715
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Issue date Dec 26, 1933
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F22 - STEAM GENERATION
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1935068
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Patent number 1,935,068
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F22 - STEAM GENERATION
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1921629
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Patent number 1,921,629
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Issue date Aug 8, 1933
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F22 - STEAM GENERATION
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1896294
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Patent number 1,896,294
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Issue date Feb 7, 1933
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F22 - STEAM GENERATION
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1869986
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Patent number 1,869,986
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Issue date Aug 2, 1932
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F22 - STEAM GENERATION