Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12352170 | Tunnel boring machine for excavating semicircular-arched tunnels | Bradley Dean Grothen, Jay Michael McNeeley | 2025-07-08 |
| 10480318 | Cutter housing with inline mounting | Carl E. Lenaburg, Ross D. Galbraith | 2019-11-19 |
| 8783786 | Cutter assembly for tunnel boring machine with pressure compensation | Aaron J. Shanahan, Timothy A. Lang, Zachary J. Box, Brian B. Khalighi, Brad D. Grothen +3 more | 2014-07-22 |