Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8318016 | Orbital wastewater treatment system, method of operating same, and kit for modifying an orbital wastewater treatment system | Thomas W. Leland, Peter W. Reko | 2012-11-27 |
| 8057674 | Orbital wastewater treatment system and method of operating same | Thomas W. Leland, Peter W. Reko | 2011-11-15 |
| 7186332 | Orbital wastewater treatment system with combined surface aerator and submerged impeller | Betty-Ann Curtis, John Vorwaller | 2007-03-06 |
| 4940545 | Aerobic waste sludge digester-thickener orbital system and method | David DiGregorio, Richard J. Eismin | 1990-07-10 |
| 4869818 | Orbital wastewater treatment system with combined surface aerator and submerged impeller | David DiGregorio, Mark G. Biesinger | 1989-09-26 |