Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5279376 | Force neutralizing mechanism for a single lever control | Xinzhan Z. Yang, Douglas F. McFarland, Donald H. Parkes | 1994-01-18 |
| 5092819 | Method and apparatus for qualitatively measuring characteristics of grain to be harvested | Michael Schroeder, Charles C. Shivvers, Carl C. Shivvers, Ronald L. McCaslen, Robert Daniel Engle | 1992-03-03 |
| 4896506 | Transmission with integrated gear reduction | Charles C. Shivvers, Richard A. Arnold, Edward A. Ryks | 1990-01-30 |
| 4845949 | Parking brake for integrated transmission | Charles C. Shivvers, Richard A. Arnold, Edward A. Ryks | 1989-07-11 |
| 4843817 | Integrated hydraulic transmission | Charles C. Shivvers, Richard A. Arnold, Edward A. Ryks | 1989-07-04 |
| 4750273 | Computer controlled grain drying | Donald H. Parkes | 1988-06-14 |