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Norman L. Kotraba
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Tega Cay, SC
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Patent Grant
Continuous feed shaft retort appartus for recovery of non-ferrous m...
Patent number
5,028,034
Issue date
Jul 2, 1991
Zia Patent Company
Norman G. Bishop
C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...