Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6533528 | Support frame for front attached implements of an operating machine and associated locating pins | Peter Theodorus Johannes Degen, Ralph E. Shirley | 2003-03-18 |
| 6424054 | Vehicle steering mode selection control | Marlin Onnen, Ralph E. Shirley, David Allen Larson | 2002-07-23 |