Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10480043 | Seamless steel pipe for line pipe and method for producing the same | Yuji Arai | 2019-11-19 |
| 10392675 | Seamless steel pipe and method for producing the same | Yuji Arai | 2019-08-27 |
| 9651175 | Seamless steel pipe for line pipe | Yuji Arai, Kei Murata, Yasuyoshi Hidaka | 2017-05-16 |