Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11689243 | Wireless communication device | — | 2023-06-27 |
| 7307410 | Alternating current detection coil | Akimi Shiokawa, Eiji Iwami, Akihiro Ishibashi, Kazunari Yoshimura | 2007-12-11 |
| 4947146 | Electromagnetic contactor | Hidetoshi Matsushita, Kenji Kawasaki, Youichi Aoyama | 1990-08-07 |
| 4523164 | Circuit breaker | Youichi Aoyama, Akira Takeuchi, Masaru Ohmuro | 1985-06-11 |