Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8798830 | Charge controller and navigation device for plug-in vehicle | Yoshihiko Sugawara, Satoshi Kouchiyama, Daisuke Nomura, Ryoichi Ijima | 2014-08-05 |
| 8138947 | Speed limit informing device installed in on-board navigation system | Syo Ichihashi, Yoshihiko Sugawara, Atsushi Hayashida | 2012-03-20 |