Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11511326 | Piercing machine, and method for producing seamless metal pipe using the same | Akihiro Sakamoto, Haruka Obe | 2022-11-29 |
| 11471923 | Production method of seamless steel pipe | Kouji Yamane, Kazuhiro Shimoda, Yuji Arai, Akihiro Sakamoto, Haruka Obe | 2022-10-18 |
| 11344935 | Piercing machine, mandrel bar, and method for producing seamless metal pipe using the same | Haruka Obe, Akihiro Sakamoto | 2022-05-31 |