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Heat exchanger assembly
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Patent number 4,373,577
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Issue date Feb 15, 1983
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International Harvester Co.
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Russell G. McMillen
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F28 - HEAT EXCHANGE IN GENERAL
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Forced air unit
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Patent number 4,313,493
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Issue date Feb 2, 1982
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Tokyo Gas Co. Ltd.
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Akira Kawase
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F24 - HEATING RANGES VENTILATING
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3642062
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Patent number 3,642,062
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Issue date Feb 15, 1972
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F28 - HEAT EXCHANGE IN GENERAL
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3592260
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Patent number 3,592,260
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Issue date Jul 13, 1971
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F28 - HEAT EXCHANGE IN GENERAL
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3469625
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Patent number 3,469,625
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Issue date Sep 30, 1969
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F28 - HEAT EXCHANGE IN GENERAL
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1903939
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Patent number 1,903,939
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Issue date Apr 18, 1933
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F28 - HEAT EXCHANGE IN GENERAL
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1896081
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Patent number 1,896,081
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Issue date Feb 7, 1933
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F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
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1884898
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Patent number 1,884,898
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Issue date Oct 25, 1932
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F28 - HEAT EXCHANGE IN GENERAL
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1829753
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Patent number 1,829,753
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Issue date Nov 3, 1931
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F28 - HEAT EXCHANGE IN GENERAL
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1421221
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Patent number 1,421,221
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Issue date Jun 27, 1922
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F28 - HEAT EXCHANGE IN GENERAL
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1417026
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Patent number 1,417,026
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Issue date May 23, 1922
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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1403319
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Patent number 1,403,319
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Issue date Jan 10, 1922
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F28 - HEAT EXCHANGE IN GENERAL
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1390899
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Patent number 1,390,899
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Issue date Sep 13, 1921
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F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
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1013449
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Patent number 1,013,449
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Issue date Jan 2, 1912
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F28 - HEAT EXCHANGE IN GENERAL
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872427
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Patent number 872,427
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Issue date Dec 3, 1907
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F28 - HEAT EXCHANGE IN GENERAL
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778152
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Patent number 778,152
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Issue date Dec 20, 1904
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F28 - HEAT EXCHANGE IN GENERAL
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632506
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Patent number 632,506
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Issue date Sep 5, 1899
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F28 - HEAT EXCHANGE IN GENERAL
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623348
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Patent number 623,348
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Issue date Apr 18, 1899
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F28 - HEAT EXCHANGE IN GENERAL
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157453
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Patent number 157,453
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Issue date Dec 8, 1874
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F28 - HEAT EXCHANGE IN GENERAL
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13031
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Patent number 13,031
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Issue date Jun 12, 1855
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F28 - HEAT EXCHANGE IN GENERAL