Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8013487 | Hydrodynamic bearing device, and spindle motor and information apparatus equipped with same | Koji Hirata, Keigo Kusaka, Takao Yoshitsugu, Yoshihito Watanabe | 2011-09-06 |
| 7210850 | Hydrodynamic bearing device, spindle motor and hard disk driving apparatus having the hydrodynamic bearing device | Keigo Kusaka, Takafumi Asada, Koichi Fujimoto | 2007-05-01 |