Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5733094 | Grain cart equipped with independently driven drag auger | Alan R. Bergkamp | 1998-03-31 |
| 5538388 | Grain cart equipped with independent hydraulically driven discharge augers | Alan R. Bergkamp, Gary L. Shellhammer | 1996-07-23 |
| 5368238 | Adjustable rotary drum bale cutter apparatus and method | Alan R. Bergkamp, Richard J. Pulliam | 1994-11-29 |