Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7374680 | Filtration matrix | Douglass E. Hughes | 2008-05-20 |
| 7169304 | Porous polymer water filter and methods of use in refrigeration | Douglass E. Hughes | 2007-01-30 |
| 7112272 | Liquid and gas porous plastic filter and methods of use | Douglass E. Hughes | 2006-09-26 |
| 7112280 | Gas porous polymer filter and methods of use | Douglass E. Hughes | 2006-09-26 |
| 6267887 | Shower filter for chlorine removal and scale deposit prevention | Douglass E. Hughes | 2001-07-31 |