Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6216940 | Pipe forming roll apparatus and method | Koji Sugano, Masahiro Kagawa, Toshio Ohnishi, Kingo Sawada, Nobuki Tanaka +5 more | 2001-04-17 |
| 6041632 | Pipe forming roll apparatus and method | Koji Sugano, Masahiro Kagawa, Toshio Ohnishi, Kingo Sawada, Nobuki Tanaka +5 more | 2000-03-28 |
| 5942132 | Method of and apparatus for producing steel pipes | Takaaki Toyooka, Motoaki Itadani, Akira Yorifuji, Yuji Hashimoto, Toshio Ohnishi +3 more | 1999-08-24 |