Issued Patents 2016
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9427795 | Method for producing a hollow engine valve | Kenichiro Hirao, Katsumi Nakamura, Hyoji Yoshimura | 2016-08-30 |
| 9302317 | Method for manufacturing hollow engine valve | Kenichiro Hirao, Hyoji Yoshimura | 2016-04-05 |