Issued Patents All Time
Showing 26–37 of 37 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6998046 | Filter system and methods of operating the same | R. Lee Roberts | 2006-02-14 |
| 6991723 | Underdrain system | R. Lee Roberts | 2006-01-31 |
| 6989096 | Apparatus for directing fluids through a filter system | R. Lee Roberts | 2006-01-24 |
| 6982034 | Underdrain system | R. Lee Roberts | 2006-01-03 |
| 6942795 | Modular filter system and method of repairing and/or replacing components thereof | R. Lee Roberts | 2005-09-13 |
| 6740237 | Low profile extruded underdrain | R. Lee Roberts, Andrew Scott Taylor | 2004-05-25 |
| 6616852 | Modular filter system | R. Lee Roberts | 2003-09-09 |
| 6569327 | Apparatus for directing fluids through a filter system | R. Lee Roberts | 2003-05-27 |
| 6325931 | Filtration system having a low profile extruded underdrain | R. Lee Roberts, Andrew Scott Taylor | 2001-12-04 |
| 6067888 | Surface treatment of circular saw blades | Nicholas E. Achterberg | 2000-05-30 |
| 5156887 | Method for injecting a chemical barrier into a surface aperture | William F. Campbell, Ralph J. Panno | 1992-10-20 |
| 5073224 | Apparatus for injecting a chemical barrier into a surface aperture | William F. Campbell, Ralph J. Panno | 1991-12-17 |