Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4723495 | Single blade sealer for fertilizer applicator | William J. Dietrich, Sr., Dean A. Knoblock | 1988-02-09 |
| 4596199 | Single blade sealer for fertilizer applicator | William J. Dietrich, Sr., Dean A. Knobloch | 1986-06-24 |
| 4592294 | Knife applicator for dry and liquid fertilizer | William J. Dietrich, Sr., Dean A. Knobloch | 1986-06-03 |
| 4582023 | Livestock self-feeder | Dennis J. Zumbahlen, Vincent J. Zumbahlen, William J. Dietrich, Sr. | 1986-04-15 |
| 4574715 | Agricultural fertilizer applicator | William J. Dietrich, Sr., Dean A. Knobloch | 1986-03-11 |
| 4548277 | Spring reset mechanism for tillage tool | William J. Dietrich, Sr. | 1985-10-22 |
| 4546832 | Agricultural implement with spring cushion for vertically adjustable subframe | William J. Dietrich, Sr. | 1985-10-15 |
| 4418761 | Adjustable tillage implement positioning apparatus | William J. Dietrich, Sr. | 1983-12-06 |
| 4243352 | Suspension for silo unloaders | Donald G. Wells | 1981-01-06 |
| 4227836 | Suspension for silo unloaders | Donald G. Wells | 1980-10-14 |