Issued Patents 2011
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D640290 | Micro-trenching blade | Vernon T. Stellman, Michael C. Walgren | 2011-06-21 |
| D640291 | Conical cutting element | Vernon T. Stellman, Michael C. Walgren | 2011-06-21 |
| D640292 | Micro-trenching blade | Vernon T. Stellman, Michael C. Walgren | 2011-06-21 |