Issued Patents All Time
Showing 1–25 of 40 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 |
| 12157937 | Duplex stainless steel seamless pipe and method for manufacturing same | Shunsuke Sasaki, Tatsuro Katsumura, Hiroki Ota, Kazuki Fujimura | 2024-12-03 |
| 12140265 | Seamless pipe and method for manufacturing same | Shunsuke Sasaki, Tatsuro Katsumura, Hideo Kijima | 2024-11-12 |
| 12098438 | Stainless steel seamless pipe | Yuichi Kamo | 2024-09-24 |
| 11827949 | Martensitic stainless steel seamless pipe for oil country tubular goods, and method for manufacturing same | Mami Endo, Yuichi Kamo | 2023-11-28 |
| 11773461 | Martensitic stainless steel seamless pipe for oil country tubular goods, and method for manufacturing same | Mami Endo, Yuichi Kamo | 2023-10-03 |
| 11655526 | Duplex stainless steel and method for producing same | Kenichiro Eguchi | 2023-05-23 |
| 11566301 | Dual-phase stainless steel, and method of production thereof | Yusuke Yoshimura, Hiroki Ota, Yuichi Kamo, Kenichiro Eguchi | 2023-01-31 |
| 11505842 | Low-alloy high-strength seamless steel pipe for oil country tubular goods | Mitsuhiro Okatsu, Yoichi Ito | 2022-11-22 |
| 11453924 | Low-alloy high-strength seamless steel pipe for oil country tubular goods | Mitsuhiro Okatsu, Yoichi Ito | 2022-09-27 |
| 11414733 | Low-alloy high-strength seamless steel pipe for oil country tubular goods | Mitsuhiro Okatsu, Yoichi Ito | 2022-08-16 |
| 11401570 | Martensitic stainless steel seamless pipe for oil country tubular goods, and method for manufacturing same | Mami Endo, Yuichi Kamo | 2022-08-02 |
| 11313007 | High-strength seamless steel pipe for oil country tubular goods, and method for producing the same | Mitsuhiro Okatsu | 2022-04-26 |
| 11306369 | High-strength stainless steel seamless pipe for oil country tubular goods, and method for producing same | Yuichi Kamo, Kenichiro Eguchi, Yasuhide Ishiguro | 2022-04-19 |
| 11286548 | High-strength stainless steel seamless pipe for oil country tubular goods, and method for manufacturing same | Yuichi Kamo, Kenichiro Eguchi, Yasuhide Ishiguro | 2022-03-29 |
| 11268161 | High strength seamless stainless steel pipe and method for producing same | Yuichi Kamo, Kenichiro Eguchi | 2022-03-08 |