Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4547640 | Electrical contact structure of a vacuum interrupter | Yoshiyuki Kashiwagi, Kaoru Kitakizaki | 1985-10-15 |
| 4471184 | Vacuum interrupter | Yoshiyuki Kashiwagi, Hifumi Yanagisawa | 1984-09-11 |