Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6495786 | Vacuum exhaust element of vacuum switch | Masashige Tsuji, Ayumu Morita, Toru Tanimizu, Katsunori Kojima, Yuichi Ishikawa | 2002-12-17 |
| 6114647 | Bellows and vacuum switch using the bellows | Ayumu Morita, Toru Tanimizu, Toshio Horikoshi, Takanori Hashimoto | 2000-09-05 |
| 4604643 | Semiconductor rectifier device | Katsuhiko Kubota, Toshinobu Sekiba | 1986-08-05 |