Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5039831 | Circuit breaker | Kastuichi Kashimura, Masanori Tsukushi, Yukio Kurosawa, Kazuhiro Saito, Osamu Koyanagi +1 more | 1991-08-13 |
| 4939322 | Puffer type circuit breaker | Katsuichi Kashimura, Osamu Koyanagi, Yukio Kurosawa | 1990-07-03 |