Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10603724 | Cartesian pipe facer | James R. Perrault, Seth P. Ahrens, Abraham B. Contreras, William Barton Draeger | 2020-03-31 |
| 9604288 | Cartesian pipe facer | James R. Perrault, Seth P. Ahrens, Abraham B. Contreras, William Barton Draeger | 2017-03-28 |