Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11047479 | Method for producing piston ring with recess | Kazuhiro Fujimura, Atsushi Chiba, Naoyuki Akimoto | 2021-06-29 |
| 10514097 | Method for producing piston ring with recess | Kazuhiro Fujimura, Atsushi Chiba, Naoyuki Akimoto | 2019-12-24 |
| 10330198 | Multi-piece oil ring | Atsushi Chiba, Kazuhiro Fujimura, Makoto Kajiwara | 2019-06-25 |
| 10030772 | Multi-piece oil ring | Atsushi Chiba, Kazuhiro Fujimura, Makoto Kajiwara | 2018-07-24 |
| 9464717 | Piston ring | Michihiro Ito, Naoyuki Akimoto, Makoto Kajiwara, Atsushi Chiba | 2016-10-11 |
| 8820750 | Internal combustion engine oil ring | Atsushi Chiba, Kazuhiro Fujimura, Makoto Kajiwara | 2014-09-02 |
| 7493882 | Combination of a cylinder liner and a piston ring | Katsuaki Ogawa, Hiromi Ishikawa, Tsugane Hirase, Kazuhiro Sameshima | 2009-02-24 |