Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888458 | Apparatus for disconnecting a switch of a high voltage electric circuit | Hiroshi Suzuyama, Osamu Mikami | 1989-12-19 |
| 4862319 | Gas-insulated switchgear | Hiroshi Suzuyama, Yoshirou Suzuki | 1989-08-29 |