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Steam turbine
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Patent number 4,819,434
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Issue date Apr 11, 1989
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Chris R. Gudmundson
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F22 - STEAM GENERATION
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3807364
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Patent number 3,807,364
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Issue date Apr 30, 1974
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F22 - STEAM GENERATION
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3057165
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Patent number 3,057,165
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Issue date Oct 9, 1962
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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2871832
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Patent number 2,871,832
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Issue date Feb 3, 1959
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F22 - STEAM GENERATION