Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11072910 | Work machine | Takeo Yamada, Shota Nakamura | 2021-07-27 |
| 11031684 | Earth-moving machine | Takeo Yamada, Hiroshi Abe, Ryosuke Okui | 2021-06-08 |
| 10597853 | Measuring jig and hydraulic excavator calibration method | Ryosuke Okui, Takeo Yamada | 2020-03-24 |
| 10422111 | Hydraulic excavator and hydraulic excavator calibration method | Takeo Yamada, Ryosuke Okui | 2019-09-24 |
| 7905343 | Self-propelled crushing machine | Tooru Nakayama | 2011-03-15 |