Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5697150 | Method forming an electric contact in a vacuum circuit breaker | Yoshitaka Kojima, Yukio Kurosawa, Yoshio Koguchi, Toru Tanimizu, Yoshimi Hakamata +1 more | 1997-12-16 |
| 5691521 | Vacuum circuit breaker with improved contact assembly | Yoshitaka Kojima, Yukio Kurosawa, Shunkichi Endoo, Tooru Tanimizu, Yoshimi Hakamata +1 more | 1997-11-25 |
| 5612523 | Vacuum circuit-breaker and electrode assembly therefor and a manufacturing method thereof | Yoshimi Hakamata, Toru Tanimizu, Akira Osaka | 1997-03-18 |
| 5594224 | Vacuum circuit interrupter | Toru Tanimizu, Yoshimi Hakamata, Masato Kobayashi, Akira Osaka | 1997-01-14 |