Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8198904 | Synchrophasor measuring device and inter-bus-line phase angle difference measurement unit using the same | — | 2012-06-12 |
| 8190387 | Frequency measurement apparatus | — | 2012-05-29 |
| 8129980 | AC electric quantity measuring device | — | 2012-03-06 |
| 7701090 | Active filter | — | 2010-04-20 |
| 7504818 | Rotation phase angle measuring device, and control-protecting devices of electric power system using the same | — | 2009-03-17 |
| 7006935 | Synchronous vector measuring device | — | 2006-02-28 |
| 6985824 | Frequency measuring device | — | 2006-01-10 |