Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6641721 | Process and apparatus for treating wastewater | — | 2003-11-04 |
| 6488853 | Process and apparatus for treating wastewater | — | 2002-12-03 |
| 6395181 | Process and apparatus for treating wastewater | — | 2002-05-28 |
| 5837142 | Membrane process for treating sanitary wastewater | Guy W. Roy | 1998-11-17 |
| 4229202 | Wastewater treatment with ultraviolet disinfection and increased capacity | Fred G. Williams | 1980-10-21 |
| 4217219 | Sewage delivery and filtration system | Fred G. Williams | 1980-08-12 |
| 4191647 | Filtration system for household sewage | Fred G. Williams | 1980-03-04 |