Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5672194 | Method and apparatus for extracting precious metals from their ores and the product thereof | Robert M. Hunter, Tamara Darsow | 1997-09-30 |
| 5608171 | Distributed, unattended wastewater monitoring system | Robert M. Hunter | 1997-03-04 |
| 5601763 | In situ pipeline rehabilitation system | Robert M. Hunter, William H. Hunter | 1997-02-11 |