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2379597
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Patent number 2,379,597
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Issue date Jul 3, 1945
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F22 - STEAM GENERATION
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2355590
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Patent number 2,355,590
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F22 - STEAM GENERATION
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Patent number 2,347,004
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F22 - STEAM GENERATION
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F22 - STEAM GENERATION
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1984608
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F22 - STEAM GENERATION
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Patent number 1,901,871
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F22 - STEAM GENERATION
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F22 - STEAM GENERATION
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F22 - STEAM GENERATION
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F22 - STEAM GENERATION
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F22 - STEAM GENERATION
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F22 - STEAM GENERATION