Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872909 | Process for acid leaching of manganese oxide ores aided by hydrogen peroxide | Richard R. Corwin | 1989-10-10 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872909 | Process for acid leaching of manganese oxide ores aided by hydrogen peroxide | Richard R. Corwin | 1989-10-10 |