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Rotary oven
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Patent number 4,050,889
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Issue date Sep 27, 1977
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Belco Industries, Incorporated
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Thomas F. Kohn
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F27 - FURNACES KILNS OVENS RETORTS
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3572522
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Patent number 3,572,522
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Issue date Mar 30, 1971
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C21 - METALLURGY OF IRON
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2951491
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Patent number 2,951,491
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Issue date Sep 6, 1960
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C21 - METALLURGY OF IRON
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2174918
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Patent number 2,174,918
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Issue date Oct 3, 1939
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C21 - METALLURGY OF IRON