Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5074993 | Flotation process | Andrew N. Kerr, Dietrich Liechti, Maria A. Marticorena | 1991-12-24 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5074993 | Flotation process | Andrew N. Kerr, Dietrich Liechti, Maria A. Marticorena | 1991-12-24 |