Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9903089 | Tubular insert for excavated hole with safety cover | Darren Bartels | 2018-02-27 |
| 9650803 | Tubular insert for excavated hole with safety cover | Darren Bartels | 2017-05-16 |