Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4767103 | Convertor pressure control device in a convertor waste gas disposing device | Nobuhiro Sakanashi, Toru Yoshida, Katsumi Hachiga, Shigeharu Kawai | 1988-08-30 |
| 4749171 | Method and apparatus for measuring slag-foam conditions within a converter | Keizi Arima, Toru Yoshida | 1988-06-07 |
| 4651976 | Method for operating a converter used for steel refining | Keizi Arima, Toru Yoshida, Hiroshi Narita | 1987-03-24 |