Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7946784 | Grating system | Ronald L. Knak | 2011-05-24 |
| 6962026 | Expansion joint cover | Ronny L. Knak, Johnnie Daniel Hilburn, Jr. | 2005-11-08 |
| 6942419 | Grate assembly | Ronny L. Knak | 2005-09-13 |
| 6581347 | Expansion joint cover | Ronny L. Knak, Johnnie Daniel Hilburn, Jr. | 2003-06-24 |