Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5645701 | Capping board with pultruded filling bars | Robert Dufresne | 1997-07-08 |
| 4749464 | Non conductive edge strip for use on an electrolytic metal refining cathode | Robert Dufresne | 1988-06-07 |
| 4213842 | Capping board for electrolytic metal refining | — | 1980-07-22 |