Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6623569 | Duplex stainless steels | David S. Bergstrom, John J. Dunn, John F. Grubb | 2003-09-23 |
| 6551420 | Duplex stainless steel | David S. Bergstrom, John J. Dunn, John F. Grubb | 2003-04-22 |