Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4465991 | Operating device for effecting opening and closing operation of a vacuum interrupter with an electromagnet incorporated therein | Shinzo Sakuma, Hifumi Yanagisawa, Hiroshi Miyagawa | 1984-08-14 |
| 4434331 | Vacuum power interrupting device | Shinzo Sakuma, Hifumi Yanagisawa, Hiroshi Miyagawa | 1984-02-28 |
| 4429197 | Vacuum power interrupting device | Shinzo Sakuma, Hifumi Yanagisawa, Hiroshi Miyagawa | 1984-01-31 |
| 4421961 | Vacuum circuit breaker | Shinzo Sakuma, Hifumi Yanagisawa, Hiroshi Miyagawa | 1983-12-20 |