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3619089
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Patent number 3,619,089
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Issue date Nov 9, 1971
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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2399008
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Patent number 2,399,008
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Issue date Apr 23, 1946
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES