Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6073602 | Piston for internal-combustion engine | — | 2000-06-13 |
| 5211102 | Knock pin arrangement for piston ring | — | 1993-05-18 |
| 5042364 | Piston structure for internal combustion engine | Eiji Okamura, Hiroyuki Watanabe, Hirofumi Kato | 1991-08-27 |