Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5672643 | Fluorescent dye blends | David M. Burns, David B. Olson | 1997-09-30 |
| 5605761 | Articles exhibiting durable color containing a polycarbonate, a fluorescent dye and an amine light stabilizer | David M. Burns | 1997-02-25 |
| 5387458 | Articles exhibiting durable fluorescence with an ultraviolet screening layer | David M. Burns, Raymond P. Johnston, Edward S. Shinbach | 1995-02-07 |
| 4637950 | Delamination-resistant cellular retroreflective sheeting | David L. Bergeson, Barbara A. Mielke | 1987-01-20 |