Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5083484 | Pipe end preparation tool having improved torque reacting and clamping capabilities | Jerald VanderPol, Mark A. Marshall | 1992-01-28 |
| 4955263 | Pipe end preparation tool having improved torque reacting and clamping capabilities | Jerald VanderPol, Mark A. Marshall | 1990-09-11 |