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Process for decarburizing ferro-manganese
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Patent number 4,192,675
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Issue date Mar 11, 1980
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S.A. Manganese Amcor Ltd.
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Robert A. Featherstone
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Process for refining non-ferrous matte
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Patent number 4,171,216
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Issue date Oct 16, 1979
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Creusot-Loire
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Pierre J. Leroy
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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Rotary connector
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Patent number 4,065,159
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Issue date Dec 27, 1977
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Sprunck; E.
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Pierre Leroy
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C21 - METALLURGY OF IRON
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Converter
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Patent number 3,985,350
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Issue date Oct 12, 1976
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Sprunck; Emile
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Pierre Leroy
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C21 - METALLURGY OF IRON