Issued Patents 2019
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10487373 | Steel pipe for line pipe and method of manufacturing the same | Taro OE, Hiroki Kamitani, Yuji Arai | 2019-11-26 |
| 10415125 | Thick-wall oil-well steel pipe and production method thereof | Yuji Arai, Koji Nagahashi | 2019-09-17 |
| 10407758 | Steel for oil country tubular goods and method of producing the same | Tomohiko Omura, Yuji Arai, Kaori Kawano, Akihiro Sakamoto, Kazuo Okamura +3 more | 2019-09-10 |
| 10287645 | Method for producing high-strength steel material excellent in sulfide stress cracking resistance | Yuji Arai | 2019-05-14 |