Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12292118 | Piston ring | Naoki Umeda, Masayuki Ohira, Akira Hikone | 2025-05-06 |
| 12066111 | Piston ring | Satoshi Minemura, Kenichiro Kosaka | 2024-08-20 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12292118 | Piston ring | Naoki Umeda, Masayuki Ohira, Akira Hikone | 2025-05-06 |
| 12066111 | Piston ring | Satoshi Minemura, Kenichiro Kosaka | 2024-08-20 |