Issued Patents 2023
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11774014 | Threaded connection for steel pipes | Hikari Nakano, Masaaki Sugino | 2023-10-03 |
| 11753878 | Threaded connection for steel pipe | Masaaki Sugino, Shin Ugai, Hikari Nakano | 2023-09-12 |
| 11624460 | Threaded connection for steel pipe | Masaaki Sugino, Yousuke Oku | 2023-04-11 |