Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5646486 | Fail-safe uninterruptible lighting system | W. Joe Watson | 1997-07-08 |
| 5633564 | Modular uninterruptible lighting system | Allan A. Nostwick, Roland O. Hildebrand | 1997-05-27 |