Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12371765 | Seamless steel pipe suitable for use in sour environment | Seiya OKADA, Nobuaki Komatsubara, Yusaku Tomio, Shohei Ikeda, Naoya Shirasawa | 2025-07-29 |
| 12054798 | Steel material and method for producing steel material | Yuji Arai, Shinji Yoshida, Yohei Otome | 2024-08-06 |
| 11905580 | Seamless steel pipe suitable for use in sour environment | Nobuaki Komatsubara, Seiya OKADA, Atsushi Soma, Yuji Arai, Shinji Yoshida | 2024-02-20 |
| 11898216 | Seamless steel pipe heat-treatment-finishing-treatment continuous facility | Takanori Tanaka, Atsushi Soma, Keiichi Kondo, Hideki MITSUNARI, Seiya OKADA +3 more | 2024-02-13 |
| 11891680 | Steel material suitable for use in sour environment | Yohei Otome, Atsushi Soma, Taro OE, Nobuaki Komatsubara, Yuji Arai +1 more | 2024-02-06 |
| 11773460 | Steel pipe and method for producing steel pipe | Yuji Arai, Shinji Yoshida, Atsushi Soma | 2023-10-03 |
| 11643712 | Steel pipe and method for producing steel pipe | Yuji Arai, Shinji Yoshida, Atsushi Soma | 2023-05-09 |
| 11434554 | Steel material suitable for use in sour environment | Atsushi Soma, Keiichi Kondo, Shinji Yoshida, Yuji Arai | 2022-09-06 |
| 11332813 | Steel material suitable for use in sour environment | Shinji Yoshida, Yuji Arai, Atsushi Soma | 2022-05-17 |
| 11313005 | Seamless steel pipe and method for producing the seamless steel pipe | Atsushi Soma, Yuji Arai, Yosuke Tatebayashi, Keisuke Furo, Takenori Kuramoto +1 more | 2022-04-26 |
| 11174539 | Steel material suitable for use in sour environment | Atsushi Soma, Shinji Yoshida, Yuji Arai, Seiya OKADA | 2021-11-16 |
| 11155893 | Steel material suitable for use in sour environment | Shinji Yoshida, Yuji Arai, Atsushi Soma | 2021-10-26 |
| 11078558 | Steel material, oil-well steel pipe, and method for producing steel material | Yuji Arai, Shinji Yoshida, Atsushi Soma | 2021-08-03 |
| 11066718 | Method of manufacturing stainless pipe for oil wells and stainless steel pipe for oil wells | Taro OE | 2021-07-20 |
| 10487373 | Steel pipe for line pipe and method of manufacturing the same | Taro OE, Keiichi Kondo, Yuji Arai | 2019-11-26 |