Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D591778 | Refractory block | John J. Stephansky | 2009-05-05 |
| D567829 | Refractory block | John J. Stephansky | 2008-04-29 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D591778 | Refractory block | John J. Stephansky | 2009-05-05 |
| D567829 | Refractory block | John J. Stephansky | 2008-04-29 |