Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12258864 | Tunnel excavation device | Naoki Sekiyama, Hiroshi Asano, Taku Arakawa | 2025-03-25 |
| 12173607 | Tunnel excavation device | Naoki Sekiyama, Hiroshi Asano, Taku Arakawa | 2024-12-24 |
| 9802472 | Cooling device and work vehicle equipped with same | Eishi Nakamura, Kouichi Kasahara | 2017-10-31 |