Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6357341 | Piston of internal combustion engine | Hiroaki Watanabe | 2002-03-19 |
| 5894824 | Piston for internal combustion engines | Hiroaki Watanabe, Kazuhiko Shirane, Hideyuki Miyasaka | 1999-04-20 |
| 5105564 | Insole part for use in manufacturing shoes | — | 1992-04-21 |
| 4918776 | Method of manufacturing shoes and insole part | — | 1990-04-24 |