Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4688332 | Method and apparatus for aeration of stored grain | Daniel Kallestad | 1987-08-25 |
| 4522335 | Method and apparatus for aeration of stored grain | Daniel Kallestad, Bruce A. Kress | 1985-06-11 |