Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8047193 | Non-core drill bit | Takuma Nonaka, Kazuhisa Morita | 2011-11-01 |
| 7568529 | Drill tool | Takuma Nonaka | 2009-08-04 |
| 7534076 | Core bit | Kigen Agehara, Michio Yamashita | 2009-05-19 |
| 7308949 | Concrete drill | Kigen Agehara, Motoshige Akatsu | 2007-12-18 |
| 7241087 | Core bit | Kigen Agehara, Michio Yamashita | 2007-07-10 |
| 7204321 | Concrete drill | Kigen Agehara, Motoshige Akatsu | 2007-04-17 |