Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6966983 | Continuous multistage thermophilic aerobic sludge digestion system | John R. McWhirter, Bradley A. Swope | 2005-11-22 |
| 6860631 | Surface aeration impeller designs | John R. McWhirter | 2005-03-01 |