Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4652965 | High level magnetic trip circuit | Henry J. Zylstra | 1987-03-24 |
| 4209818 | Circuit breaker having an electronic fault sensing and trip initiating unit | Henry J. Zylstra | 1980-06-24 |