Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5412544 | Method of illuminating and providing emergency egress guidance for hazardous areas | Donald E. Derrick, Hollis A. Harris, Robert H. Marion, L. Christopher Towle | 1995-05-02 |
| 4857416 | Infra-red emitting electroluminescent lamp structures | William H. Kreiling | 1989-08-15 |