| 9067727 |
Apparatus and method for removing materials from a material collection container |
R. Lee Roberts, Mark Robert Battaglia, Mark Kevin Addison, David Stuart Paskman |
2015-06-30 |
| 8992774 |
Flume system for a filter system including at least one filter having a filter bed that is periodically washed with liquid, gas or a combination thereof |
R. Lee Roberts, Mark Kevin Addison, Jason Samuel Schmoyer |
2015-03-31 |
| 8333889 |
Flume system for a filter system including at least one filter having a filter bed that is periodically washed with liquid, gas or a combination thereof |
R. Lee Roberts, Mark Kevin Addison, Jason Samuel Schmoyer |
2012-12-18 |
| 6740237 |
Low profile extruded underdrain |
R. Lee Roberts, Mark Kevin Addison |
2004-05-25 |
| 6325931 |
Filtration system having a low profile extruded underdrain |
R. Lee Roberts, Mark Kevin Addison |
2001-12-04 |
| 5673481 |
Air grid for underdrains and similar systems |
R. Lee Roberts, Douglas H. Eden |
1997-10-07 |
| 5534202 |
Air grid for underdrains and similar systems |
R. Lee Roberts, Douglas H. Eden |
1996-07-09 |