Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5804150 | Process for treating gold-containing sulfide ores | Michael Tacke, Walter Pierson | 1998-09-08 |
| 5783158 | Process for treating sulfide ores containing gold and/or silver and as accompanying metal at least iron | Michael Tacke, Walter Pierson | 1998-07-21 |