Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE37181 | Process for removal of dissolved hydrogen sulfide and reduction of sewage BOD in sewer or other waste systems | David J. Hunniford | 2001-05-22 |
| RE36651 | Process for removal of dissolved hydrogen sulfide and reduction of sewage BOD in sewer or other waste systems | David J. Hunniford | 2000-04-11 |
| RE35234 | Modular air scrubber system | — | 1996-05-14 |
| 5307697 | Continuous, automated, multi-stream sample collection and analysis | Anthony J. Freed, Jr. | 1994-05-03 |
| 5094752 | Aerobic wastewater treatment with alkalinity control | James Paul Harshman | 1992-03-10 |
| 5013442 | Aerobic wastewater treatment with alkalinity control | James Paul Harshman | 1991-05-07 |
| 4948402 | Modular air scrubber system | — | 1990-08-14 |
| 4911843 | Process for removal of dissolved hydrogen sulfide and reduction of sewage BOD in sewer or other waste systems | David J. Hunniford | 1990-03-27 |
| 4767537 | Dewatering of sludge using nitrate | — | 1988-08-30 |