Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866920 | Unloading auger position switch | Duane Herbert Ziegler | 1989-09-19 |
| 4838010 | Electronics enclosure for an agricultural combine | Duane Herbert Ziegler, Jerry W. Hansen, Barry K. Denning | 1989-06-13 |