Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9777352 | Oil-well steel pipe having excellent sulfide stress cracking resistance | Atsushi Soma, Tomohiko Omura, Yuji Arai, Toru Takayama, Masanao Seo | 2017-10-03 |
| 9175371 | Steel for steel tube with excellent sulfide stress cracking resistance | Tomohiko Omura, Masayuki Morimoto, Toru Takayama, Atsushi Soma | 2015-11-03 |
| 8262767 | Method of producing steel for steel pipe excellent in sour-resistance performance | Shingo Takeuchi, Tomohiko Omura | 2012-09-11 |
| 7959709 | Method of producing steel for steel pipe excellent in sour-resistance performance | Shingo Takeuchi, Tomohiko Omura | 2011-06-14 |
| 7648587 | Steel product for use as line pipe having high HIC resistance and line pipe produced using such steel product | Takahiro Kushida, Tomohiko Omura | 2010-01-19 |
| 7635406 | Method for manufacturing a low alloy steel excellent in corrosion resistance | Tomohiko Omura, Yoshihiko Higuchi | 2009-12-22 |
| 7264684 | Steel for steel pipes | Tomohiko Omura, Yoshihiko Higuchi | 2007-09-04 |