Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5757614 | Gas insulated switchgear apparatus | Masaki Hachida, Hirohiko Yatsuzuka, Tadasuke Yamamoto | 1998-05-26 |
| 5754382 | Gas insulated switchgear and power transmission system using the switchgear | Tadasuke Yamamoto | 1998-05-19 |
| 5581439 | Gas insulated switchgear | Masaki Hachida, Hirohiko Yatsuzuka | 1996-12-03 |
| 4555603 | Grounding switch | — | 1985-11-26 |
| 4458099 | Three-phase combined type gas insulated electrical apparatus | Susumu Takeuti, Minoru Sakaguchi, Kazuaki Oishi | 1984-07-03 |