Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10697495 | Iron-copper-based oil-impregnated sintered bearing and method for manufacturing same | Yoshinari Ishii, Yasuhiro Tsukada | 2020-06-30 |
| 10428873 | Iron-copper-based oil-impregnated sintered bearing and method for manufacturing same | Yoshinari Ishii, Yasuhiro Tsukada | 2019-10-01 |