Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4744316 | Furrow forming apparatus for a seed planter | Nicholas H. Wunschl, Donald L. Ledermann | 1988-05-17 |
| 4425857 | Lock-up mechanism for a planter row unit | Donald L. Ledermann, Nicholas H. Wunschl | 1984-01-17 |