Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6375059 | Method for smoothing steel pipe seam portion | Toshio Ohnishi, Masahiro Kagawa, Yoshnori Sugie, Koji Sugano, Nobuki Tanaka +6 more | 2002-04-23 |
| 6216511 | Apparatus and method for smoothing a welded seam of steel pipe | Toshio Ohnishi, Masahiro Kagawa, Yoshnori Sugie, Koji Sugano, Nobuki Tanaka +6 more | 2001-04-17 |
| 6216940 | Pipe forming roll apparatus and method | Koji Sugano, Masahiro Kagawa, Toshio Ohnishi, Yoshinori Sugie, Nobuki Tanaka +5 more | 2001-04-17 |
| 6041632 | Pipe forming roll apparatus and method | Koji Sugano, Masahiro Kagawa, Toshio Ohnishi, Yoshinori Sugie, Nobuki Tanaka +5 more | 2000-03-28 |
| 4760724 | Method of and apparatus for controlling operation of a cross helical rolling mill | Shuji Okazaki, Mikio Kodaka, Masahiro Kagawa, Shiro Hatakeyama, Teruo Kobayashi +1 more | 1988-08-02 |