Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4843194 | Air break contactor | — | 1989-06-27 |
| 4839477 | Controller having interchangeable vacuum or air break contactors and having easily serviced parts | Dominick Tringali, Donald B. Monson, Gerald J. Kuiper | 1989-06-13 |
| 4831347 | Air break contactor | — | 1989-05-16 |