Issued Patents 2025
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12398436 | High-strength stainless steel seamless pipe for oil country tubular goods and method for manufacturing same | Kenichiro Eguchi | 2025-08-26 |
| 12359752 | Stainless steel pipe and method for manufacturing same | Shunsuke Sasaki, Tatsuro Katsumura, Hideo Kijima | 2025-07-15 |
| 12331371 | Stainless steel pipe and method for manufacturing same | Shunsuke Sasaki, Tatsuro Katsumura, Hideo Kijima | 2025-06-17 |
| 12291766 | Stainless steel seamless pipe and method for manufacturing same | Yuichi Kamo | 2025-05-06 |
| 12264376 | Duplex stainless steel and method for manufacturing same, and duplex stainless steel pipe | Kazuki Fujimura, Kenichiro Eguchi, Yusuke Yoshimura | 2025-04-01 |
| 12252756 | High-strength seamless steel pipe and method for manufacturing same | Mitsuhiro Okatsu, Toshiharu Hirama | 2025-03-18 |
| 12234525 | Martensitic stainless steel seamless pipe for oil country tubular goods, and method for manufacturing same | Mami Endo, Yuichi Kamo | 2025-02-25 |
| 12227815 | Seamless steel pipe having desirable sulfuric acid dew-point corrosion resistance, and method for manufacturing same | Hiroyuki Takai, Yasumasa Takemura, Mitsuhiro Okatsu | 2025-02-18 |
| 12227816 | High-strength seamless steel pipe and method for manufacturing same | Mitsuhiro Okatsu, Toshiharu Hirama | 2025-02-18 |
| 12221663 | Martensitic stainless steel seamless pipe for oil country tubular goods, and method for manufacturing same | Mami Endo, Yuichi Kamo | 2025-02-11 |