Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5757614 | Gas insulated switchgear apparatus | Hirohiko Yatsuzuka, Takanobu Aoyama, Tadasuke Yamamoto | 1998-05-26 |
| 5581439 | Gas insulated switchgear | Hirohiko Yatsuzuka, Takanobu Aoyama | 1996-12-03 |