Issued Patents 2025
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12276197 | Tunnel excavation device | Naoki Sekiyama, Hiroshi Asano, Shinichi Terada, Eiichi Morioka | 2025-04-15 |
| 12258864 | Tunnel excavation device | Masahiro Suwano, Naoki Sekiyama, Hiroshi Asano | 2025-03-25 |