Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5764462 | Field ground fault detector and field ground fault relay for detecting ground corresponding to DC component extracted ground fault current | Toshio Tanaka, Yoshinori Takei | 1998-06-09 |
| 5675465 | Field ground fault detector and field ground fault relay for detecting ground fault corresponding to DC component extracted from ground fault current | Toshio Tanaka, Yoshinori Takei | 1997-10-07 |