Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4919714 | Method and apparatus for refining steel | Saburo Sugiura, Senji Fujita, Tetsuo Okamoto, Yoshio Inagaki, Keiichi Mizuguchi +1 more | 1990-04-24 |
| 4689800 | Method of melting raw material with an electric arc furnace | Shigeru Hanada, Etsuo Inagaki | 1987-08-25 |