Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4515353 | Tundish cover for ductile iron treatment | Gerry E. Isenberg, Robert D. Keller | 1985-05-07 |
| 4488711 | Treating ladle for ductile iron treatment | Gerry E. Isenberg, Robert D. Keller | 1984-12-18 |