Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5076226 | Internal combustion engine piston | Hiroaki Watanabe, Tatsuyuki Matsuya | 1991-12-31 |
| 5063893 | Piston structure for internal combustion engine | — | 1991-11-12 |
| 5058489 | Piston structure for internal combustion engine | — | 1991-10-22 |