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Fuel burning furnace
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Issue date Jan 29, 1991
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Rajendra K. Narang
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F24 - HEATING RANGES VENTILATING
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Fuel burning furnace
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Issue date May 8, 1990
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Rajendra K. Narang
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F24 - HEATING RANGES VENTILATING
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Fluid shut-off device
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Patent number 4,245,814
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Issue date Jan 20, 1981
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Kunio Shimizu
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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3718924
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Patent number 3,718,924
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Issue date Feb 27, 1973
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G05 - CONTROLLING REGULATING