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Opposed flow heat exchanger
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Patent number 6,076,598
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Issue date Jun 20, 2000
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Mitsubishi Denki Kabushiki Kaisha
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Akira Doi
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F24 - HEATING RANGES VENTILATING
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Heat exchanger
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Patent number 4,832,118
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Issue date May 23, 1989
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Sundstrand Corporation
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John F. Scanlon
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F28 - HEAT EXCHANGE IN GENERAL
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-
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3608629
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Patent number 3,608,629
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Issue date Sep 28, 1971
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F28 - HEAT EXCHANGE IN GENERAL
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3520357
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Patent number 3,520,357
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Issue date Jul 14, 1970
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F28 - HEAT EXCHANGE IN GENERAL
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3165152
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Patent number 3,165,152
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Issue date Jan 12, 1965
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F28 - HEAT EXCHANGE IN GENERAL
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3106242
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Patent number 3,106,242
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Issue date Oct 8, 1963
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F28 - HEAT EXCHANGE IN GENERAL
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2875986
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Patent number 2,875,986
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Issue date Mar 3, 1959
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F28 - HEAT EXCHANGE IN GENERAL
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2874941
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Patent number 2,874,941
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Issue date Feb 24, 1959
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F28 - HEAT EXCHANGE IN GENERAL
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2656158
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Patent number 2,656,158
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Issue date Oct 20, 1953
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F28 - HEAT EXCHANGE IN GENERAL
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2632633
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Patent number 2,632,633
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Issue date Mar 24, 1953
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F28 - HEAT EXCHANGE IN GENERAL
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1692391
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Patent number 1,692,391
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Issue date Nov 20, 1928
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F28 - HEAT EXCHANGE IN GENERAL
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27747
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Patent number 27,747
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Issue date Apr 3, 1860
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E06 - DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL LADDERS