Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6216940 | Pipe forming roll apparatus and method | Koji Sugano, Masahiro Kagawa, Toshio Ohnishi, Kingo Sawada, Yoshinori Sugie +5 more | 2001-04-17 |
| 6041632 | Pipe forming roll apparatus and method | Koji Sugano, Masahiro Kagawa, Toshio Ohnishi, Kingo Sawada, Yoshinori Sugie +5 more | 2000-03-28 |
| 5607098 | Tubular shape finishing apparatus for an electro-resistance-welded pipe | Tatsuaki Urata | 1997-03-04 |
| 5161444 | Traveling pipe cutter | Osamu Yokoyama | 1992-11-10 |