Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9926206 | Treatment of manganese-containing materials | William F. Drinkard, Jr., Hans J. Woerner | 2018-03-27 |
| 9328400 | Treatment of manganese-containing materials | William F. Drinkard, Jr., Hans J. Woerner | 2016-05-03 |
| 9284627 | Process for recovering metal values from oxides of manganese-containing materials | William F. Drinkard, Jr., Hans J. Woerner | 2016-03-15 |