Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6488560 | Walking apparatus | — | 2002-12-03 |
| 5992560 | Muffler for internal combustion engine | Hirotake Matsuoka, Keiichi Sakashita, Keiji Yamada, Koji Fukushima | 1999-11-30 |
| 5862590 | Method of manufacturing catalytic converter for the purification of exhaust gas | Keiichi Sakashita | 1999-01-26 |