Issued Patents 2020
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10746227 | Ball bearing and main shaft device for machine tool | Yoshiaki Katsuno, Kyohei Matsunaga | 2020-08-18 |
| 10690180 | Ball bearing and main shaft device for machine tool | Yoshiaki Katsuno, Kyohei Matsunaga | 2020-06-23 |
| 10670078 | Ball bearing and main shaft device for machine tool | Yoshiaki Katsuno, Kyohei Matsunaga | 2020-06-02 |