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3826091
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Patent number 3,826,091
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Issue date Jul 30, 1974
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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3218802
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Patent number 3,218,802
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Issue date Nov 23, 1965
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES