Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4860155 | Overvoltage protection device | — | 1989-08-22 |
| 4807081 | Circuit protection arrangement | David Crofts | 1989-02-21 |
| 4799125 | Circuit protection arrangement | David Crofts | 1989-01-17 |