Issued Patents 2022
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11505842 | Low-alloy high-strength seamless steel pipe for oil country tubular goods | Masao Yuga, Yoichi Ito | 2022-11-22 |
| 11453924 | Low-alloy high-strength seamless steel pipe for oil country tubular goods | Masao Yuga, Yoichi Ito | 2022-09-27 |
| 11414733 | Low-alloy high-strength seamless steel pipe for oil country tubular goods | Masao Yuga, Yoichi Ito | 2022-08-16 |
| 11313007 | High-strength seamless steel pipe for oil country tubular goods, and method for producing the same | Masao Yuga | 2022-04-26 |