Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6755279 | Controllable muffler system for internal combustion engine | Yukio Kaneko, Shinichi Horiuchi, Kai Takeuchi, Atsushi Kijima | 2004-06-29 |
| 5806899 | Flexible connection tube for automotive exhaust system | Hiroyuki Aihara | 1998-09-15 |
| 5744762 | Muffler controller for use in controllable exhaust system of internal combustion engine | Koji Seki, Yukio Nakanishi | 1998-04-28 |
| 5723829 | Muffler assembly of internal combustion engine | Tomohisa Inomata, Tohru Awaya, Koji Seki, Yukio Nakanishi | 1998-03-03 |
| 5692374 | Exhaust system of internal combustion engine | Koji Seki, Yukio Nakanishi | 1997-12-02 |