Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6051144 | Liquid filtration system and replaceable filter cartridge usable therewith | Robert A. Clack, Richard E. Clack, W. Roger McPherson | 2000-04-18 |
| 5876610 | Method and apparatus for monitoring liquid flow through an enclosed stream | Robert A. Clack, W. Roger McPherson | 1999-03-02 |
| RE35252 | Fluid flow control device for water treatment systems | Robert A. Clack, Richard E. Clack | 1996-05-28 |
| 5389260 | Brine seal for tubular filter | Daniel A. Klein | 1995-02-14 |
| D355241 | Water filter | Russell Zylstra, John T. Dailey, Peter Chermak, Robert A. Clack, Dan Klein +2 more | 1995-02-07 |
| 5128035 | Fluid flow control device for water treatment systems | Robert A. Clack, Richard E. Clack | 1992-07-07 |
| 5002664 | Fluid flow control device for R.O. filtration purification systems | Robert A. Clack, Richard E. Clack | 1991-03-26 |