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Gas boiler
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Patent number 5,596,953
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Issue date Jan 28, 1997
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Daewoo Electronics Co., Ltd.
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Woong S. Hong
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F24 - HEATING RANGES VENTILATING
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Multiple boiler
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Patent number 5,228,413
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Issue date Jul 20, 1993
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Raymond T. Tam
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F24 - HEATING RANGES VENTILATING
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3308805
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Patent number 3,308,805
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Issue date Mar 14, 1967
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F24 - HEATING RANGES VENTILATING
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3236212
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Patent number 3,236,212
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Issue date Feb 22, 1966
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F24 - HEATING RANGES VENTILATING
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3185201
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Patent number 3,185,201
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Issue date May 25, 1965
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F24 - HEATING RANGES VENTILATING
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2904014
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Patent number 2,904,014
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Issue date Sep 15, 1959
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F24 - HEATING RANGES VENTILATING
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2641232
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Patent number 2,641,232
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Issue date Jun 9, 1953
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F24 - HEATING RANGES VENTILATING
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2521462
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Patent number 2,521,462
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Issue date Sep 5, 1950
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F24 - HEATING RANGES VENTILATING
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2146887
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Patent number 2,146,887
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Issue date Feb 14, 1939
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F24 - HEATING RANGES VENTILATING
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2097387
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Patent number 2,097,387
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Issue date Oct 26, 1937
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F24 - HEATING RANGES VENTILATING
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2048393
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Patent number 2,048,393
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Issue date Jul 21, 1936
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F24 - HEATING RANGES VENTILATING
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1967706
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Patent number 1,967,706
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Issue date Jul 24, 1934
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F24 - HEATING RANGES VENTILATING
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1963078
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Patent number 1,963,078
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Issue date Jun 19, 1934
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F24 - HEATING RANGES VENTILATING