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1668462
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Patent number 1,668,462
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Issue date May 1, 1928
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1610332
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Patent number 1,610,332
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Issue date Dec 14, 1926
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F24 - HEATING RANGES VENTILATING
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1036148
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Patent number 1,036,148
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Issue date Aug 20, 1912
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A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
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906428
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Patent number 906,428
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Issue date Dec 8, 1908
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F24 - HEATING RANGES VENTILATING
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688301
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Patent number 688,301
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Issue date Dec 10, 1901
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F24 - HEATING RANGES VENTILATING