Issued Patents All Time
Showing 26–35 of 35 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6881245 | Membrane air dryer and method of mounting a membrane dryer to a vehicle | Randall W. Nichols, Fred W. Hoffman | 2005-04-19 |
| 6878194 | Remote purge drying unit for compressed gas | Fred W. Hoffman | 2005-04-12 |
| 6858066 | Air dryer module | Fred W. Hoffman, David J. Goodell | 2005-02-22 |
| 6786953 | Spin-on desiccant cartridge with integral oil removal filter | William P. Fornof, James P. Koenig | 2004-09-07 |
| 6695893 | Continuous flow dryer reservoir module dryer system | Fred W. Hoffman, Charles E. Eberling | 2004-02-24 |
| 6679527 | Push-to-connect fittings for air brake reservoirs | Fred W. Hoffman | 2004-01-20 |
| 6585806 | Air dryer reservoir module components | Fred W. Hoffman, David J. Goodell | 2003-07-01 |
| 6358291 | Trailer air dryer with bypass valving and service indicator | James P. Koenig, Richard J. Conklin, Fred W. Hoffman | 2002-03-19 |
| 6074462 | Air dryer reservoir module components | Fred W. Hoffman, David J. Goodell | 2000-06-13 |
| 5917139 | Air dryer reservoir module | David J. Goodell, Fred W. Hoffman | 1999-06-29 |