| 6051144 |
Liquid filtration system and replaceable filter cartridge usable therewith |
Robert A. Clack, Melvin R. Hemp, W. Roger McPherson |
2000-04-18 |
| RE35252 |
Fluid flow control device for water treatment systems |
Robert A. Clack, Melvin R. Hemp |
1996-05-28 |
| 5460719 |
Modular flat filter assembly and method of making same |
Robert A. Clack, Paul Michael Pedersen |
1995-10-24 |
| 5320752 |
Water purification system employing modular flat filter assembly |
Robert A. Clack |
1994-06-14 |
| 5128035 |
Fluid flow control device for water treatment systems |
Robert A. Clack, Melvin R. Hemp |
1992-07-07 |
| 5002664 |
Fluid flow control device for R.O. filtration purification systems |
Robert A. Clack, Melvin R. Hemp |
1991-03-26 |
| D296460 |
Cartridge for filtration or absorption media |
— |
1988-06-28 |
| 4235340 |
Salt grid for a brine tank |
Jack E. Wies |
1980-11-25 |