HR

H. Jan Roorda

AM Amax: 1 patents #59 of 180Top 35%
Overall (All Time): #4,116,732 of 4,157,543Top 100%
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Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4214901 Hydrometallurgical refining of nickeliferous sulfides Eugene J. Michal, Simon O. Fekete 1980-07-29