Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7931757 | Seamless steel pipe for line pipe and a process for its manufacture | Kunio Kondo, Yuji Arai | 2011-04-26 |
| 7896984 | Method for manufacturing seamless steel pipe for line pipe | Kenji Kobayashi, Tomohiko Omura, Kunio Kondo, Yuji Arai | 2011-03-01 |
| 7896985 | Seamless steel pipe for line pipe and a process for its manufacture | Yuji Arai, Kunio Kondo | 2011-03-01 |
| 7815755 | Seamless steel pipe and manufacturing method thereof | Yuji Arai, Kunio Kondo | 2010-10-19 |
| 7416617 | High strength seamless steel pipe excellent in hydrogen-induced cracking resistance | Nobutoshi Murao, Hajime Osako, Kunio Kondo | 2008-08-26 |