Issued Patents All Time
Showing 26–50 of 50 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7186337 | Quick-change filter and bracket system | — | 2007-03-06 |
| 7172693 | Quick change filter and bracket with key system and universal key option | — | 2007-02-06 |
| 7166215 | Pressure vessel and recyclable filter cartridge | — | 2007-01-23 |
| 7138052 | Quick change fitter and bracket system with key system and universal key option | — | 2006-11-21 |
| 7029351 | Body board and handle for same | James C. Reid | 2006-04-18 |
| 6977006 | Keyed system for connection of filter cartridge to filter holder | — | 2005-12-20 |
| 6926826 | Quick change filter and bracket system with key system and universal key option | — | 2005-08-09 |
| 6776906 | Quick-change filter and bracket system | — | 2004-08-17 |
| 6709603 | Split-flow water filtration apparatus and method | — | 2004-03-23 |
| 6695891 | Keyed system for connection of filter cartridge to filter holder | — | 2004-02-24 |
| 6576129 | Recyclable filter cartridge and pressure vessel | — | 2003-06-10 |
| 6533931 | Recycle filter cartridge and pressure vessel | — | 2003-03-18 |
| 6277292 | Split-flow water filtration apparatus and method | — | 2001-08-21 |
| 6274038 | Water purifier with adjustable volume in dwell passage | — | 2001-08-14 |
| 5944989 | Split-flow water filtration apparatus | — | 1999-08-31 |
| 5908553 | Water purifier with adjustable volume in dwell passage | — | 1999-06-01 |
| 5885450 | Vessel with captive tube support ring | — | 1999-03-23 |
| 5865996 | Water purifier with collet and tube support | — | 1999-02-02 |
| 5840185 | Sports bottle filter cartridge | Douglass E. Hughes | 1998-11-24 |
| 5744030 | Filter assembly with automatic shut-off and quick-connect filter cartridge | Lance J. Christiansen, Warren Stockton | 1998-04-28 |
| 5591332 | Filter assembly with automatic shut-off and quick-connect filter cartridge | Lance J. Christiansen | 1997-01-07 |
| 5552057 | Water-purifying device | Doug Hughes | 1996-09-03 |
| 5248417 | Double flow-through filtration apparatus | — | 1993-09-28 |
| 5232590 | Water filtration apparatus | — | 1993-08-03 |
| 4626350 | Filter cartridge | — | 1986-12-02 |