Issued Patents 2018
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10036078 | Low alloy oil well steel pipe and method for manufacturing same | Yuji Arai, Keiichi Kondo | 2018-07-31 |
| 9909198 | Method for producing a low alloy steel for oil country tubular goods having excellent sulfide stress cracking resistance | Yuji Arai, Kaori Kawano, Akihiro Sakamoto, Kazuo Okamura, Kenji Yamamoto +1 more | 2018-03-06 |