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3717082
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Issue date Feb 20, 1973
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F24 - HEATING RANGES VENTILATING
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Issue date Aug 28, 1951
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F24 - HEATING RANGES VENTILATING
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Patent number 1,830,217
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Issue date Nov 3, 1931
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F24 - HEATING RANGES VENTILATING
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Issue date Feb 3, 1920
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F24 - HEATING RANGES VENTILATING