Issued Patents 2019
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10514097 | Method for producing piston ring with recess | Kazuhiro Fujimura, Naoyuki Akimoto, Iwao Hiraishi | 2019-12-24 |
| 10330198 | Multi-piece oil ring | Kazuhiro Fujimura, Iwao Hiraishi, Makoto Kajiwara | 2019-06-25 |