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3527244
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F27 - FURNACES KILNS OVENS RETORTS
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Patent number 3,217,780
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Issue date Nov 16, 1965
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F27 - FURNACES KILNS OVENS RETORTS
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C21 - METALLURGY OF IRON
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3097835
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Patent number 3,097,835
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Patent number 3,021,890
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F27 - FURNACES KILNS OVENS RETORTS
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F27 - FURNACES KILNS OVENS RETORTS
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F27 - FURNACES KILNS OVENS RETORTS
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F27 - FURNACES KILNS OVENS RETORTS
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F27 - FURNACES KILNS OVENS RETORTS