Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6527512 | Mud motor | Robert Bertin, William D. Nielsen | 2003-03-04 |
| 6371224 | Threaded spacer | Stephen E. Freeman, David J. Krus, Donald J. Moracz, William D. Nielsen | 2002-04-16 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6527512 | Mud motor | Robert Bertin, William D. Nielsen | 2003-03-04 |
| 6371224 | Threaded spacer | Stephen E. Freeman, David J. Krus, Donald J. Moracz, William D. Nielsen | 2002-04-16 |