Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4997411 | Cage and retainer combination for check valves and slack adjusters using same | Mark M. Wigsten | 1991-03-05 |
| 4894047 | Retaining cage for check-valves and slack adjusters using same | Leslie L. Ecklund | 1990-01-16 |
| 4826470 | Fluid operated chain or belt tensioning device | Bryce A. Buuck, Leslie L. Ecklund | 1989-05-02 |