Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4727760 | Connection between the equalizer beam and the walking beam of a walking beam type oil well pumping unit | Donald L. Bailey, Brian Davis | 1988-03-01 |
| 4270801 | Steering and cutter drum positioning in a paved roadway planing machine | George W. Swisher, Jr., Donald W. Smith | 1981-06-02 |
| D256466 | Road planing machine | Donald W. Smith | 1980-08-19 |