Issued Patents 2018
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10006546 | Piston ring | Masayuki Sato, Youhei IWAMOTO, Takuma Sekiya | 2018-06-26 |
| 10006547 | Piston ring and its production method | Masayuki Sato, Youhei IWAMOTO, Takuma Sekiya | 2018-06-26 |