Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7231792 | Method and device for manufacturing UOE steel pipes | Hidenori Shitamoto, Yoshimasa Matsumoto | 2007-06-19 |
| 6948649 | Method of producing steel pipes, and welded pipes | Nobuaki Takahashi, Akio Yamamoto, Tomoaki Ikeda | 2005-09-27 |