Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6644226 | Seed sowing apparatus | Craig David Kernohan, David Robinson, William Rowlan Ritchie | 2003-11-11 |
| 5269237 | Seed sowing apparatus | Craig D. Kerndhan, David Robinson | 1993-12-14 |
| 4648466 | Furrow opener operating apparatus | Craig David Kernohan | 1987-03-10 |
| 4501973 | Skids for rotating machinery | Keith E. Fenemore, George P. Foden | 1985-02-26 |
| 4275671 | Seed sowing implements | — | 1981-06-30 |