Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7399934 | External operation handle device | Makoto Osawa, Hideki Ishido | 2008-07-15 |
| 7368675 | External operation handle device for a circuit breaker | Hideki Ishido, Makoto Osawa | 2008-05-06 |
| 6819206 | Circuit breaker | Koji Asakawa, Katsunori Kuboyama | 2004-11-16 |
| 6642820 | Protective switch | Koji Asakawa, Katsunori Kuboyama, Hisao Kawata | 2003-11-04 |
| 6577215 | Instantaneous-tripping circuit breaker | Koji Nomura, Katsunori Kuboyama, Koji Asakawa, Isamu Nagahiro | 2003-06-10 |