Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4581501 | Ignition distributor for internal combustion engine | Ken Takahashi, Yasuo Matsushita, Seiichi Yamada, Hiromitsu Nagae | 1986-04-08 |
| 4565907 | Ignition distributor for internal combustion engine | Ken Takahashi, Yasuo Matsushita, Seiichi Yamada, Tetuo Kosugi | 1986-01-21 |
| 4367017 | Laser beam reflection system | Tomio Umino, Tomohiko Shida, Tomio Iizuka, Shoji Isobe | 1983-01-04 |