Issued Patents All Time
Showing 1–25 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9266515 | Air dryer purge controller and method | David J. Pfefferl, Andras Sipos, Aaron S. Wilfing, Cory Hamilton | 2016-02-23 |
| 9101856 | Purge exhaust processor | Randall W. Nichols, William P. Fornof, Fred W. Hoffman, Richard J. Conklin | 2015-08-11 |
| 8585809 | Air dryer cartridge | Eugene Clair | 2013-11-19 |
| 8557030 | Air dryer assembly | William P. Fornof | 2013-10-15 |
| 8118911 | Air drying arrangement | Fred W. Hoffman | 2012-02-21 |
| 7981194 | Air drying arrangement | Fred W. Hoffman | 2011-07-19 |
| D629090 | Air dryer | Gregory R. Ashley | 2010-12-14 |
| 7819958 | Purge valve | Fred W. Hoffman, Randall W. Nichols | 2010-10-26 |
| 7789925 | Purge exhaust processor | William P. Fornof, Fred W. Hoffman, Randall W. Nichols | 2010-09-07 |
| 7789950 | Air dryer with oil removal filter | Fred W. Hoffman, William P. Fornof | 2010-09-07 |
| D621017 | Air dryer | Gregory R. Ashley | 2010-08-03 |
| 7753069 | Drain valve | Randall W. Nichols, Fred W. Hoffman | 2010-07-13 |
| 7708793 | Purge exhaust processor | William P. Fornof, Fred W. Hoffman, Randall W. Nichols | 2010-05-04 |
| 7631656 | Pressure control valve | Fred W. Hoffman | 2009-12-15 |
| D604821 | Air dryer | Gregory R. Ashley | 2009-11-24 |
| 7520922 | Air dryer system | Fred W. Hoffman, Eugene Clair | 2009-04-21 |
| D574940 | Air dryer system | Fred W. Hoffman | 2008-08-12 |
| D573240 | Air dryer system | Fred W. Hoffman | 2008-07-15 |
| D570979 | Air dryer reservoir | Fred W. Hoffman | 2008-06-10 |
| 7285149 | Oil separator for vehicle air system | William P. Fornof, Gregory R. Ashley, Fred W. Hoffman, Gregory C. Smith | 2007-10-23 |
| D546431 | Air dryer reservoir | Fred W. Hoffman | 2007-07-10 |
| RE39467 | Air dryer reservoir module components | Fred W. Hoffman, David J. Goodell | 2007-01-16 |
| 7100305 | Air dryer mounting assembly | Fred W. Hoffman | 2006-09-05 |
| 7008472 | Spin-on filtering oil removal cartridge | William P. Fornof, Gregory R. Ashley | 2006-03-07 |
| 6951581 | Spin-on desiccant cartridge with integral oil removal filter | William P. Fornof, James P. Koenig | 2005-10-04 |