Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11994219 | Side rail and oil control ring comprising same | Yoshiyuki Hirade, Kentaro Miyagawa | 2024-05-28 |
| 10557551 | Combined oil control ring | Hiroshi Shimizu | 2020-02-11 |
| 9618115 | Combined oil control ring | Masaaki Fujita, Hiroyuki Sugihara | 2017-04-11 |