Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4694599 | Electromagnetic flip-type visual indicator | Robert D. Hart | 1987-09-22 |
| 4661813 | Magnetic latching and damping for electromagnetic indicators | Robert Mazzamauro | 1987-04-28 |