Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12352170 | Tunnel boring machine for excavating semicircular-arched tunnels | Bradley Dean Grothen, Stephen M. Smading | 2025-07-08 |
| 8783786 | Cutter assembly for tunnel boring machine with pressure compensation | Aaron J. Shanahan, Stephen M. Smading, Timothy A. Lang, Zachary J. Box, Brian B. Khalighi +3 more | 2014-07-22 |