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Heat exchanger
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Patent number 4,708,199
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Issue date Nov 24, 1987
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Kabushiki Kaisha Tsuchiya Seisakusho
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Takeji Yogo
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F28 - HEAT EXCHANGE IN GENERAL
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3610331
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Patent number 3,610,331
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Issue date Oct 5, 1971
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F28 - HEAT EXCHANGE IN GENERAL
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2677531
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Patent number 2,677,531
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Issue date May 4, 1954
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F28 - HEAT EXCHANGE IN GENERAL
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1669062
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Patent number 1,669,062
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Issue date May 8, 1928
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F28 - HEAT EXCHANGE IN GENERAL
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1453041
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Patent number 1,453,041
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Issue date Apr 24, 1923
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F28 - HEAT EXCHANGE IN GENERAL
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1325637
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Patent number 1,325,637
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Issue date Dec 23, 1919
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F28 - HEAT EXCHANGE IN GENERAL
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1213349
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Patent number 1,213,349
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Issue date Jan 23, 1917
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F28 - HEAT EXCHANGE IN GENERAL
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1170902
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Patent number 1,170,902
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Issue date Feb 8, 1916
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F28 - HEAT EXCHANGE IN GENERAL
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840667
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Patent number 840,667
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Issue date Jan 8, 1907
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F28 - HEAT EXCHANGE IN GENERAL
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704818
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Patent number 704,818
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Issue date Jul 15, 1902
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F28 - HEAT EXCHANGE IN GENERAL