Issued Patents 2005
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6937453 | Directional comparison distance relay system | Takahiro Kase, Yasutaka Sonobe | 2005-08-30 |
| 6906903 | Protection relay | Yasuhiro Kurosawa, Hideyuki Takani | 2005-06-14 |
| 6873508 | Protective relay system | Takahiro Kase, Yasutaka Sonobe | 2005-03-29 |