Issued Patents 2022
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11339901 | Threaded connection for steel pipes | Masaaki Sugino | 2022-05-24 |
| 11313181 | Threaded connection for steel pipe | Masaaki Sugino, Yousuke Oku | 2022-04-26 |
| 11300233 | Threaded connection for steel pipe | Masaaki Sugino, Hikari Nakano | 2022-04-12 |