Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4506370 | Arc furnace installation with shroud | — | 1985-03-19 |
| 4395023 | Shroud for steel making electric-arc furnace | Fumio Tomizawa, Katsutoshi Sobata, Sadayuki Saito, Takashi Otani, Senzaburo Hirano | 1983-07-26 |