Issued Patents 2021
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11143337 | Threaded connection for steel pipe | Masaaki Sugino | 2021-10-12 |
| 11015746 | Threaded connection | Satoshi Maruta | 2021-05-25 |
| 10883632 | Threaded joint for steel pipes | Masaaki Sugino, Fumio Ota | 2021-01-05 |