Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11598094 | Retaining wall block and retaining wall block system | Robert John Lundell | 2023-03-07 |
| 10760269 | Retaining wall block and retaining wall block system | Robert John Lundell | 2020-09-01 |
| D846760 | Wall block | Robert John Lundell | 2019-04-23 |
| 9028175 | Retaining wall block system | Joseph M. Friederichs | 2015-05-12 |
| 8622659 | Retaining wall block system | Joseph M. Friederichs | 2014-01-07 |