Issued Patents 2011
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8070890 | Induction hardened hollow driving shaft | Kouichi Kuroda | 2011-12-06 |
| 7931757 | Seamless steel pipe for line pipe and a process for its manufacture | Yuji Arai, Nobuyuki Hisamune | 2011-04-26 |
| 7896984 | Method for manufacturing seamless steel pipe for line pipe | Kenji Kobayashi, Tomohiko Omura, Yuji Arai, Nobuyuki Hisamune | 2011-03-01 |
| 7896985 | Seamless steel pipe for line pipe and a process for its manufacture | Yuji Arai, Nobuyuki Hisamune | 2011-03-01 |