Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5838644 | Electroluminescent display and luminous timepiece dial | Koji Yoneda, Koji Hirose, Iwao Hirayama | 1998-11-17 |
| 5726531 | Electroluminescent element | Koji Hirose | 1998-03-10 |
| 5552668 | Self-waterproofing electroluminescent device | Koji Hirose | 1996-09-03 |
| 4583768 | Flexible exhaust coupling | Shizuo Onotani, Toshinobu Shimotaka, Yoshitaka Nakamura | 1986-04-22 |