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3049145
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Patent number 3,049,145
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Issue date Aug 14, 1962
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G05 - CONTROLLING REGULATING
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2790459
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Patent number 2,790,459
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Issue date Apr 30, 1957
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G05 - CONTROLLING REGULATING
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2744504
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Patent number 2,744,504
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Issue date May 8, 1956
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F22 - STEAM GENERATION
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2659350
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Patent number 2,659,350
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Issue date Nov 17, 1953
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G05 - CONTROLLING REGULATING
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2638078
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Patent number 2,638,078
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Issue date May 12, 1953
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G05 - CONTROLLING REGULATING
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2426909
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Patent number 2,426,909
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Issue date Sep 2, 1947
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F22 - STEAM GENERATION
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2325241
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Patent number 2,325,241
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Issue date Jul 27, 1943
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F22 - STEAM GENERATION
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2256511
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Patent number 2,256,511
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Issue date Sep 23, 1941
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F22 - STEAM GENERATION
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2252492
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Patent number 2,252,492
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Issue date Aug 12, 1941
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F22 - STEAM GENERATION
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2250341
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Patent number 2,250,341
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Issue date Jul 22, 1941
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F22 - STEAM GENERATION
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2224190
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Patent number 2,224,190
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Issue date Dec 10, 1940
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F22 - STEAM GENERATION
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2181956
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Patent number 2,181,956
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Issue date Dec 5, 1939
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F22 - STEAM GENERATION
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2079810
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Patent number 2,079,810
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Issue date May 11, 1937
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F22 - STEAM GENERATION
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2079098
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Patent number 2,079,098
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Issue date May 4, 1937
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F22 - STEAM GENERATION
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2023073
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Patent number 2,023,073
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Issue date Dec 3, 1935
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F22 - STEAM GENERATION
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1997785
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Patent number 1,997,785
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Issue date Apr 16, 1935
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F22 - STEAM GENERATION
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1997535
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Patent number 1,997,535
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Issue date Apr 9, 1935
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F22 - STEAM GENERATION
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1962678
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Patent number 1,962,678
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F22 - STEAM GENERATION
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1945204
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Patent number 1,945,204
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Issue date Jan 30, 1934
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F22 - STEAM GENERATION
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1934486
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Patent number 1,934,486
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Issue date Nov 7, 1933
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F22 - STEAM GENERATION
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1908207
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Patent number 1,908,207
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Issue date May 9, 1933
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F22 - STEAM GENERATION
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1857051
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Patent number 1,857,051
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Issue date May 3, 1932
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F22 - STEAM GENERATION
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1853859
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Patent number 1,853,859
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F22 - STEAM GENERATION
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1820356
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Patent number 1,820,356
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F22 - STEAM GENERATION
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1737213
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Patent number 1,737,213
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F22 - STEAM GENERATION
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1730275
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Patent number 1,730,275
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F22 - STEAM GENERATION
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1725921
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Patent number 1,725,921
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Issue date Aug 27, 1929
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F22 - STEAM GENERATION
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1725920
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Patent number 1,725,920
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Issue date Aug 27, 1929
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F22 - STEAM GENERATION
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1709678
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Patent number 1,709,678
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Issue date Apr 16, 1929
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F22 - STEAM GENERATION
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1707205
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Patent number 1,707,205
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F22 - STEAM GENERATION