Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5898389 | Blackout backup for traffic light | Carl B. Henderson, Timothy W. Connolly | 1999-04-27 |
| 5806965 | LED beacon light | — | 1998-09-15 |
| 5663719 | LED traffic signal light with automatic low-line voltage compensating circuit | David Darwin Lewis | 1997-09-02 |
| 5457450 | LED traffic signal light with automatic low-line voltage compensating circuit | David Darwin Lewis | 1995-10-10 |