Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5387458 | Articles exhibiting durable fluorescence with an ultraviolet screening layer | Lee A. Pavelka, David M. Burns, Raymond P. Johnston | 1995-02-07 |
| 4952023 | Internally illuminated retroreflective sign | Thomas I. Bradshaw | 1990-08-28 |