Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5453903 | Sub-cycle digital distance relay | — | 1995-09-26 |
| 4876624 | Apparatus for detecting unsymmetrical bipolar waveforms | — | 1989-10-24 |
| 4698718 | Electronic reverse power relay | Shan C. Sun | 1987-10-06 |