Patents per Year
Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 11689243 | Wireless communication device | — | 2023-06-27 | |
| 7307410 | Alternating current detection coil | Akimi Shiokawa, Eiji Iwami, Akihiro Ishibashi, Kazunari Yoshimura | 2007-12-11 | $473,000 |
| 4947146 | Electromagnetic contactor | Hidetoshi Matsushita, Kenji Kawasaki, Youichi Aoyama | 1990-08-07 | $47,000 |
| 4523164 | Circuit breaker | Youichi Aoyama, Akira Takeuchi, Masaru Ohmuro | 1985-06-11 | $82,000 |