Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6176187 | Sludge handling and feeding system | R. Leon Leonard, Anne T. McQueen, Harley O. Biggs, Jr. | 2001-01-23 |
| 5586510 | Method and system for controlling pollutant emissions in combustion operations | R. Leon Leonard, Anne T. McQueen | 1996-12-24 |