Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11285570 | Method of manufacturing engine valve intermediate product with boss portion | Kazunori Kurahashi | 2022-03-29 |
| 9920663 | Hollow poppet valve | Osamu Tsuneishi | 2018-03-20 |