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3263422
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Patent number 3,263,422
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Issue date Aug 2, 1966
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F22 - STEAM GENERATION
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3263423
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Patent number 3,263,423
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Issue date Aug 2, 1966
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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3137134
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Patent number 3,137,134
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Issue date Jun 16, 1964
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F22 - STEAM GENERATION
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2952975
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Patent number 2,952,975
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Issue date Sep 20, 1960
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F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
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2946187
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Patent number 2,946,187
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Issue date Jul 26, 1960
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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2641233
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Patent number 2,641,233
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Issue date Jun 9, 1953
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F22 - STEAM GENERATION
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2040090
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Patent number 2,040,090
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Issue date May 12, 1936
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F22 - STEAM GENERATION
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2037493
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Patent number 2,037,493
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Issue date Apr 14, 1936
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F22 - STEAM GENERATION
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1991114
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Patent number 1,991,114
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Issue date Feb 12, 1935
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F22 - STEAM GENERATION
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1608446
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Patent number 1,608,446
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Issue date Nov 23, 1926
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F22 - STEAM GENERATION