Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7959709 | Method of producing steel for steel pipe excellent in sour-resistance performance | Mitsuhiro Numata, Shingo Takeuchi | 2011-06-14 |
| 7896984 | Method for manufacturing seamless steel pipe for line pipe | Kenji Kobayashi, Kunio Kondo, Yuji Arai, Nobuyuki Hisamune | 2011-03-01 |