Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5839516 | Folding frame assembly for a rolling harrow implement having a transport position in which the main frame is upwardly pivoted and the wing frames are forwardly pivoted | David R. Smith | 1998-11-24 |
| 5622124 | Coulter fertilizer tine | David R. Smith, Kenneth L. Bellman | 1997-04-22 |
| 4828042 | Coulter chisel tillage tool | — | 1989-05-09 |
| 4615396 | Multiple farm implement actuating system | — | 1986-10-07 |
| 4474247 | Automatic bi-positionable mechanism for plows | Paul David Parker, James F. Sullivan | 1984-10-02 |
| 4410047 | Tractor-drawn plow with hitch and furrow wheel hydraulic motors connected in series | Paul David Parker, James F. Sullivan | 1983-10-18 |
| 4253528 | Pivoting dual land wheel for a plow | James F. Sullivan | 1981-03-03 |