Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5664881 | Counter-flow asphalt plant with multi-stage combustion zone overlapping the mixing zone | Michael R. Hawkins | 1997-09-09 | |
| 5466418 | System for the remediation of highly contaminated soils | Malcolm L. Swanson, Wendell Feltman | 1995-11-14 | $886,000 |
| 4688496 | Pulverized coal burner | — | 1987-08-25 | |
| D262487 | Industrial fuel burner | — | 1981-12-29 |