Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11987950 | Method and apparatus to form rip lines across a sloping surface | David Hall | 2024-05-21 |
| 10689981 | Method of moving material | David Hall, Cameron Albert Mitchell Voss | 2020-06-23 |
| 10648331 | Method of strip mining | David Hall, Ted Boulton | 2020-05-12 |