Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4837662 | Gas insulated switchgear | Hiroshi Takeuchi, Keizo Takatsuka | 1989-06-06 |
| 4821140 | Gas insulated switchgear disconnector arrangement | Hiroshi Takeuchi, Keizo Takatsuka | 1989-04-11 |
| 4821141 | Gas insulated switchgear | Hiroshi Takeuchi, Keizo Takatsuka | 1989-04-11 |