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Air heater
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Patent number 4,018,209
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Issue date Apr 19, 1977
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Gene Ferruccio Bonvicini
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F24 - HEATING RANGES VENTILATING
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2755793
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Patent number 2,755,793
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Issue date Jul 24, 1956
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F24 - HEATING RANGES VENTILATING
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2472198
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Patent number 2,472,198
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Issue date Jun 7, 1949
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F24 - HEATING RANGES VENTILATING
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2303772
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Patent number 2,303,772
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Issue date Dec 1, 1942
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F24 - HEATING RANGES VENTILATING
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2220637
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Patent number 2,220,637
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Issue date Nov 5, 1940
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F24 - HEATING RANGES VENTILATING
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2121273
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Patent number 2,121,273
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Issue date Jun 21, 1938
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F24 - HEATING RANGES VENTILATING
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1813679
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Patent number 1,813,679
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Issue date Jul 7, 1931
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F24 - HEATING RANGES VENTILATING
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1771693
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Patent number 1,771,693
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Issue date Jul 29, 1930
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F24 - HEATING RANGES VENTILATING
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1687972
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Patent number 1,687,972
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Issue date Oct 16, 1928
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F24 - HEATING RANGES VENTILATING
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1504305
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Patent number 1,504,305
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Issue date Aug 12, 1924
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F24 - HEATING RANGES VENTILATING
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1423651
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Patent number 1,423,651
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Issue date Jul 25, 1922
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F24 - HEATING RANGES VENTILATING
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1402728
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Patent number 1,402,728
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Issue date Jan 3, 1922
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F24 - HEATING RANGES VENTILATING
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1334827
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Patent number 1,334,827
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Issue date Mar 23, 1920
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F24 - HEATING RANGES VENTILATING
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1286270
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Patent number 1,286,270
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Issue date Dec 3, 1918
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F24 - HEATING RANGES VENTILATING
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1277519
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Patent number 1,277,519
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Issue date Sep 3, 1918
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F24 - HEATING RANGES VENTILATING
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1208300
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Patent number 1,208,300
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Issue date Dec 12, 1916
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F24 - HEATING RANGES VENTILATING
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1176093
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Patent number 1,176,093
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Issue date Mar 21, 1916
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F24 - HEATING RANGES VENTILATING
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1119806
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Patent number 1,119,806
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Issue date Dec 8, 1914
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F24 - HEATING RANGES VENTILATING
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1068637
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Patent number 1,068,637
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Issue date Jul 29, 1913
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F24 - HEATING RANGES VENTILATING
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1019172
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Patent number 1,019,172
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Issue date Mar 5, 1912
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F24 - HEATING RANGES VENTILATING
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991198
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Patent number 991,198
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Issue date May 2, 1911
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F24 - HEATING RANGES VENTILATING
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960175
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Patent number 960,175
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Issue date May 31, 1910
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F24 - HEATING RANGES VENTILATING
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939890
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Patent number 939,890
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Issue date Nov 9, 1909
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F24 - HEATING RANGES VENTILATING
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782631
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Patent number 782,631
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Issue date Feb 14, 1905
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F24 - HEATING RANGES VENTILATING
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661984
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Patent number 661,984
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Issue date Nov 20, 1900
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F24 - HEATING RANGES VENTILATING
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660662
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Patent number 660,662
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Issue date Oct 30, 1900
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F24 - HEATING RANGES VENTILATING