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Gas injection apparatus
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Patent number 4,584,180
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Issue date Apr 22, 1986
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Cool Water Coal Gasification Program
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Anatoly A. Ostrov
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F28 - HEAT EXCHANGE IN GENERAL
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Tubeless heat recuperator
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Patent number 4,122,823
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Issue date Oct 31, 1978
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The Steel Company of Canada, Limited
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Robert F. Hunter
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F28 - HEAT EXCHANGE IN GENERAL
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3915222
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Patent number 3,915,222
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Issue date Oct 28, 1975
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F28 - HEAT EXCHANGE IN GENERAL
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3258508
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Patent number 3,258,508
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Issue date Jun 28, 1966
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F28 - HEAT EXCHANGE IN GENERAL
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2514529
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Patent number 2,514,529
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Issue date Jul 11, 1950
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F28 - HEAT EXCHANGE IN GENERAL
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2250864
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Patent number 2,250,864
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Issue date Jul 29, 1941
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F28 - HEAT EXCHANGE IN GENERAL
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2195957
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Patent number 2,195,957
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Issue date Apr 2, 1940
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F28 - HEAT EXCHANGE IN GENERAL