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Heat exchanger
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Patent number 5,871,045
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Issue date Feb 16, 1999
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BDAG Balcke-Durr Aktiengesellschaft
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Markus Hirth
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F28 - HEAT EXCHANGE IN GENERAL
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3850231
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Patent number 3,850,231
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Issue date Nov 26, 1974
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F28 - HEAT EXCHANGE IN GENERAL
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3572430
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Patent number 3,572,430
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Issue date Mar 23, 1971
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F28 - HEAT EXCHANGE IN GENERAL
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3183967
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Patent number 3,183,967
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Issue date May 18, 1965
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F28 - HEAT EXCHANGE IN GENERAL
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2839276
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Patent number 2,839,276
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Issue date Jun 17, 1958
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F28 - HEAT EXCHANGE IN GENERAL
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2612350
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Patent number 2,612,350
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Issue date Sep 30, 1952
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F28 - HEAT EXCHANGE IN GENERAL
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1990251
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Patent number 1,990,251
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Issue date Feb 5, 1935
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F28 - HEAT EXCHANGE IN GENERAL
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1983194
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Patent number 1,983,194
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Issue date Dec 4, 1934
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F28 - HEAT EXCHANGE IN GENERAL
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1921278
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Patent number 1,921,278
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Issue date Aug 8, 1933
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F28 - HEAT EXCHANGE IN GENERAL
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1853628
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Patent number 1,853,628
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Issue date Apr 12, 1932
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F28 - HEAT EXCHANGE IN GENERAL
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1823800
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Patent number 1,823,800
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Issue date Sep 15, 1931
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F22 - STEAM GENERATION
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1740318
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Patent number 1,740,318
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Issue date Dec 17, 1929
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F28 - HEAT EXCHANGE IN GENERAL
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1737564
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Patent number 1,737,564
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Issue date Dec 3, 1929
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F28 - HEAT EXCHANGE IN GENERAL
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1648646
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Patent number 1,648,646
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Issue date Nov 8, 1927
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F28 - HEAT EXCHANGE IN GENERAL
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1597479
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Patent number 1,597,479
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Issue date Aug 24, 1926
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F28 - HEAT EXCHANGE IN GENERAL
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1562682
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Patent number 1,562,682
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Issue date Nov 24, 1925
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F28 - HEAT EXCHANGE IN GENERAL