Issued Patents 2022
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 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 |