Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6375059 | Method for smoothing steel pipe seam portion | Masahiro Kagawa, Yoshnori Sugie, Koji Sugano, Nobuki Tanaka, Kingo Sawada +6 more | 2002-04-23 |
| 6216511 | Apparatus and method for smoothing a welded seam of steel pipe | Masahiro Kagawa, Yoshnori Sugie, Koji Sugano, Nobuki Tanaka, Kingo Sawada +6 more | 2001-04-17 |
| 6216940 | Pipe forming roll apparatus and method | Koji Sugano, Masahiro Kagawa, Kingo Sawada, Yoshinori Sugie, Nobuki Tanaka +5 more | 2001-04-17 |
| 6041632 | Pipe forming roll apparatus and method | Koji Sugano, Masahiro Kagawa, Kingo Sawada, Yoshinori Sugie, Nobuki Tanaka +5 more | 2000-03-28 |
| 6006789 | Method of preparing a steel pipe, an apparatus thereof and a steel pipe | Takaaki Toyooka, Akira Yorifuji, Motoaki Itadani, Yuji Hashimoto, Nobuki Tanaka +1 more | 1999-12-28 |
| 5942132 | Method of and apparatus for producing steel pipes | Takaaki Toyooka, Motoaki Itadani, Akira Yorifuji, Yuji Hashimoto, Nobuki Tanaka +3 more | 1999-08-24 |