Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11660691 | Reamer | Masashi YAMADA, Masaaki Jindai, Jun Okamoto, Futoshi Takeshita, Katsutoshi Fukuda | 2023-05-30 |
| 11198187 | Oil hole reamer | Jun Okamoto, Futoshi Takeshita, Katsutoshi Fukuda, Masashi YAMADA | 2021-12-14 |