Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4384676 | Traveling weir | David A. Siekmeier | 1983-05-24 |
| 4330085 | Laterally mobile irrigation system | David A. Siekmeier, Glen L. Andersen, Arthur L. Zimmerer, by First National Bank and Trust Company, executor | 1982-05-18 |