Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11753878 | Threaded connection for steel pipe | Keita Inose, Masaaki Sugino, Hikari Nakano | 2023-09-12 |
| 11415246 | Threaded joint for steel pipes | Yoshinori Ando, Yousuke Oku | 2022-08-16 |
| 11149881 | Threaded connection for steel pipe | Masaaki Sugino | 2021-10-19 |
| 10774598 | Threaded joint for steel pipes | Keita Inose, Fumio Ota, Suguru Yamaguchi, Masaaki Sugino | 2020-09-15 |
| 10473241 | Threaded joint for steel pipes | Keita Inose, Fumio Ota, Masaaki Sugino | 2019-11-12 |
| 9194515 | Threaded joint for pipes | Masahiro Oshima, Takashi Okada, Masayoshi Sasaki, Suguru Yamaguchi, Masaaki Sugino | 2015-11-24 |