Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876521 | Tripping coil with flux shifting coil and booster coil | — | 1989-10-24 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4876521 | Tripping coil with flux shifting coil and booster coil | — | 1989-10-24 |