Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5378868 | Shut off check valve for a welding gun | Ronald R. Matheson, Daniel Burnham, David A. Burnham | 1995-01-03 |
| 5178261 | Conveyor system | Ronald R. Matheson, Daniel E. Hucul, Joseph W. Schepke | 1993-01-12 |
| 5002173 | Breakaway clutch device | Daniel E. Hucul, Ronald R. Matheson | 1991-03-26 |
| 4669192 | Variable compliance device | Ronald R. Matheson, Daniel E. Hucul, Joseph W. Schepke | 1987-06-02 |