Patents per Year
Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 10618234 | Retroreflective sheeting | Kenneth L. Smith, James R. Imbertson, John C. Kelliher, Sidney A. Ellingstad | 2020-04-14 | $24,395,000 |
| 9878507 | Retroflective sheeting | Kenneth L. Smith, James R. Imbertson, John C. Kelliher, Sidney A. Ellingstad | 2018-01-30 | $32,106,000 |
| 8783879 | Retroreflective sheeting | Kenneth L. Smith, James R. Imbertson, John C. Kelliher, Sidney A. Ellingstad | 2014-07-22 | $31,254,000 |
| 8371703 | Retroreflective sheeting | Kenneth L. Smith, James R. Imbertson, John C. Kelliher, Sidney A. Ellingstad | 2013-02-12 | $18,259,000 |