Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5242177 | Lifting and supporting attachment for wheelbarrows | — | 1993-09-07 |
| 4969514 | Apparatus for retrieving pipe sections from a well bore | Robert F. Mitchell | 1990-11-13 |
| 4850435 | Cultivator sweep with pair of rearwardly extending downturned rigid flaps | Donald M. Michalchuk, Lyle E. Harper | 1989-07-25 |
| 4522268 | Packer wheel | Douglas C. Nicholls | 1985-06-11 |