Issued Patents 2017
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9783876 | Stainless steel for oil wells and stainless steel pipe for oil wells | Shinjiro Nakatsuka, Taro Ohe, Hisashi Amaya, Hideki Takabe, Yohei Otome +3 more | 2017-10-10 |
| 9777352 | Oil-well steel pipe having excellent sulfide stress cracking resistance | Atsushi Soma, Yuji Arai, Mitsuhiro Numata, Toru Takayama, Masanao Seo | 2017-10-03 |
| 9546408 | Quenching method for steel pipe | Akihiro Sakamoto, Kazuo Okamura, Kenji Yamamoto, Yuji Arai | 2017-01-17 |