Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5068791 | Distance and angle measurements in a wire guided vehicle | Kim A. Klopfleisch, Tim A. Wellman, Mark J. Koenig, Richard W. Ridgway, Bobby Lee Walters +1 more | 1991-11-26 |
| 4633702 | Torque and friction tester | Mark J. Koenig, William K. LeBlanc | 1987-01-06 |
| 4235112 | Rail flaw detector position control | — | 1980-11-25 |