Issued Patents 2024
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12173799 | Oil control ring | Takashi Oguro, Noriaki Ayuzawa, Toshihiro Yamaoka, Naoki Umeda | 2024-12-24 |
| 12117084 | Combination of piston rings, and combination structure of piston and piston rings | Hiroyuki Nagakura, Shuichi Inamori | 2024-10-15 |
| 12092222 | Piston ring combination, and internal combustion engine | Kiyoyuki Kawai | 2024-09-17 |
| 12000491 | Combination of piston rings, and combination structure of piston and piston rings | Hiroyuki Nagakura, Shuichi Inamori | 2024-06-04 |