Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6793710 | Method for blowing oxygen in converter and top-blown lance for blowing oxygen | Ikuhiro Sumi, Yoshiteru Kikuchi, Atsushi Watanabe, Shinichi Akai, Satoshi Kohira | 2004-09-21 |