Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5292200 | Ball-and-roller bearing | Yoichi Matsumoto, Kenji Yamamura | 1994-03-08 |
| 5259886 | Rolling member | Yasuo Utsumi | 1993-11-09 |
| 5108491 | Rolling bearing composition | Yoichi Matsumoto | 1992-04-28 |