Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6119347 | Method for manufacturing balls for bearing and products thereby | Kiyoshi Hirakawa, Akira Suzuki, Jiami Pu, Katsunori Yanase, Eiichi Takahashi +1 more | 2000-09-19 |
| 5603576 | Method for manufacturing balls for bearing and products thereby | Kiyoshi Hirakawa, Akira Suzuki, Jiami Pu, Katsunori Yanase, Eiichi Takahashi +1 more | 1997-02-18 |