Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6081224 | High accuracy, low speed doppler effect radar and signal conditioning circuit useful in agricultural applications | — | 2000-06-27 |
| 5598794 | High accuracy automatically controlled variable linear seed spacing planting apparatus | Louis C. Harms | 1997-02-04 |
| 5253564 | Conveyor oven control | William S. Schjerven, SR., Ralph A. Chrzastek | 1993-10-19 |
| 5197375 | Conveyor oven control | Ralph A. Chrzastek, William S. Schjerven, SR. | 1993-03-30 |
| 4394958 | Air flow and condition responsive damper | John A. Whitney | 1983-07-26 |