Issued Patents All Time
Showing 1–4 of 4 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 |
| 12173607 | Tunnel excavation device | Naoki Sekiyama, Masahiro Suwano, Hiroshi Asano | 2024-12-24 |
| 7257702 | Boot time reducing device including boot preparation instructing unit | Mikihiko Yamada, Norihiko Mizobata | 2007-08-14 |