Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10618234 | Retroreflective sheeting | Kenneth L. Smith, James R. Imbertson, John C. Kelliher, John A. Worrell | 2020-04-14 |
| 9878507 | Retroflective sheeting | Kenneth L. Smith, James R. Imbertson, John C. Kelliher, John A. Worrell | 2018-01-30 |
| 8783879 | Retroreflective sheeting | Kenneth L. Smith, James R. Imbertson, John C. Kelliher, John A. Worrell | 2014-07-22 |
| 8371703 | Retroreflective sheeting | Kenneth L. Smith, James R. Imbertson, John C. Kelliher, John A. Worrell | 2013-02-12 |