Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4821499 | Rotary rakes | — | 1989-04-18 |
| 4815545 | Subsoil blade ploughs | — | 1989-03-28 |
| 4800713 | Rotary rakes | — | 1989-01-31 |
| 4796939 | Lifting means | Kenneth R. King, William N. Smith | 1989-01-10 |