Issued Patents 2011
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8075774 | Effluent filter cartridge with progressive filtration | — | 2011-12-13 |
| 8070949 | Micro diffusion of oxygen for treatment and dispersal of wastewater in a drain field | Jeffrey G. Karl | 2011-12-06 |
| 7926510 | Risers for use with access openings in wastewater treatment tanks | Thomas N. Jenkins | 2011-04-19 |