Issued Patents All Time
Showing 26–46 of 46 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7543711 | Fluid filter element | Mark A. Roll | 2009-06-09 |
| 7531090 | Fluid filter element | Mark A. Roll | 2009-05-12 |
| 7335300 | Fluid filter element | Mark A. Roll | 2008-02-26 |
| RE40051 | One-piece self-venting drain valve | Mark A. Roll | 2008-02-12 |
| 7083514 | Air-filtration system for vehicle operator | Gregory K. Rhyne, Jim Strasser | 2006-08-01 |
| 6994787 | Clear plastic injection molded fuel/water separator | Mark A. Roll | 2006-02-07 |
| 6911141 | Low waste liquid filter | Gregory K. Rhyne | 2005-06-28 |
| 6800194 | Low waste liquid filter | Gregory K. Rhyne | 2004-10-05 |
| 6761822 | Dual filter with flow mixer and centrifugal separator | Gregory K. Rhyne, Mark A. Roll, Johnny H. Wong | 2004-07-13 |
| 6712870 | Seals for air filters | Robert S. Cunningham | 2004-03-30 |
| 6565746 | One-piece self-venting drain valve | Mark A. Roll | 2003-05-20 |
| 6423225 | Liquid filter with centrifugal separator | Johnny H. Wong, Gregory K. Rhyne | 2002-07-23 |
| 6423222 | Ergonomically configured can for filter cartridges and wrench for use therewith | Terrance Allen Shively, Gregory K. Rhyne | 2002-07-23 |
| 6401575 | Wrench for fuel filter housing covers | Terrance Allen Shively, Mark A. Roll | 2002-06-11 |
| 6350379 | Dual filter with flow mixer | Mark A. Roll, Gregory K. Rhyne | 2002-02-26 |
| 6270660 | Flow inverter for filters | Mark A. Roll | 2001-08-07 |
| 5954847 | Radial air filter | Terrence Allen Shively | 1999-09-21 |
| 5830349 | Flow inverter for filters | Mark A. Roll | 1998-11-03 |
| 5783078 | Fuel/water separator filter without flow diverters and method of making same | Mark A. Roll | 1998-07-21 |
| 5733443 | Inside to outside flow filters | Mark A. Roll, Christopher L. Loafman | 1998-03-31 |
| 5606989 | Self-venting valve arrangement | Mark A. Roll, Christopher L. Loafman | 1997-03-04 |