Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4446346 | Vacuum interrupter | Yutaka Kashimoto, Shinzo Sakuma | 1984-05-01 |
| 4408107 | Vacuum interrupter | Shinzo Sakuma, Junichi Warabi, Yukio Kobari, Hidemi Kawaguchi | 1983-10-04 |