Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7282868 | Inverter circuit for discharge lamps for multi-lamp lighting and surface light source system | Masakazu Ushijima, Koji Kawamoto, Youichi Yamamoto | 2007-10-16 |
| 7141935 | Inverter circuit for surface light source system | Masakazu Ushijima | 2006-11-28 |