| 8333894 |
Multi-level filter device |
— |
2012-12-18 |
| 8226833 |
Multi-level filter device |
— |
2012-07-24 |
| 8182685 |
Effluent filter cartridge with progressive filtration |
— |
2012-05-22 |
| 8182676 |
Wastewater effluent filter case with gas baffle |
— |
2012-05-22 |
| 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 |
| 7740756 |
Wastewater filter system |
Michael Hornback, Jerome A. Mehling |
2010-06-22 |
| 7682512 |
Multi-level filter device |
— |
2010-03-23 |
| 7309419 |
Fluid diverter for a wastewater treatment system |
Kevin J. Rhorer |
2007-12-18 |
| 7160460 |
System and method for treating wastewater using coir filter |
— |
2007-01-09 |
| 6890433 |
System for treating wastewater |
Harry L. Nurse, Jr. |
2005-05-10 |
| 6772789 |
Flow leveling device |
Michael Hornback |
2004-08-10 |
| 6749743 |
Fuel diverter for a recirculating wastewater treatment system |
Kevin J. Rohrer |
2004-06-15 |
| 6749367 |
Orifice shield for a drainage conduit in a wastewater treatment drain field |
— |
2004-06-15 |
| D483836 |
Biofilter treatment module |
Harry L. Nurse, Jr. |
2003-12-16 |
| 6540912 |
Aerobic polishing system for wastewater |
Harry L. Nurse, Jr. |
2003-04-01 |
| 6478957 |
Filtering apparatus for a wastewater treatment tank |
Harry L. Nurse, Jr. |
2002-11-12 |