Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5642863 | Method of extracting metals from ore material | Norbert Patzelt | 1997-07-01 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5642863 | Method of extracting metals from ore material | Norbert Patzelt | 1997-07-01 |