Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4675774 | Direct transfer trip apparatus for use with an active pilot wire communications channel | Shan C. Sun | 1987-06-23 |
| 4675775 | Active pilot wire apparatus for electromechanical current differential relays | Shan C. Sun | 1987-06-23 |