Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10625727 | Combined oil and water separator in an air brake dryer | Thomas Martin Tomchak | 2020-04-21 |
| 10183658 | Combined oil and water separator in an air brake dryer | Thomas Martin Tomchak | 2019-01-22 |
| 9604167 | Multistage high capacity and depth coalescing media system | Walter H. Stone | 2017-03-28 |
| 7648565 | Filter element | Michael D. Clausen, Steven D. Hardison | 2010-01-19 |
| 6171491 | Fuel filter assembly with standpipe having valve element | David H. Hodgkins, Michael D. Clausen, Russell D. Jensen, Walter H. Stone, Victor A. Oelschlaegel | 2001-01-09 |
| 6113781 | Fuel filter with dual flow | David H. Hodgkins, Michael D. Clausen, Russell D. Jensen, Walter H. Stone, Victor A. Oelschlaegel | 2000-09-05 |
| 6053334 | Fuel filter with valve device | David H. Hodgkins, Michael D. Clausen, Russell D. Jensen, Walter H. Stone, Victor A. Oelschlaegel | 2000-04-25 |
| 6015492 | Fuel filter assembly with replaceable element | David H. Hodgkins, Michael D. Clausen, Victor R. Oelschlaegel | 2000-01-18 |
| 5770065 | Fuel filter assembly with replacement element | David H. Hodgkins, Michael D. Clausen, Victor R. Oelschlaegel | 1998-06-23 |
| 5244571 | Fuel filter assembly with heater | John F. Church, Kenneth N. Wynne, Darwin L. Brooks, Walter H. Stone | 1993-09-14 |
| 4997555 | Fuel filter assembly with heater | John F. Church, Ken N. Wynne, Darwin L. Brooks, Walter H. Stone | 1991-03-05 |
| 4836923 | Cartridge and cover assembly for fluid filters | Walter H. Stone, John F. Church | 1989-06-06 |
| 4740299 | Filter assembly with threaded collection bowl | John F. Church, Walter H. Stone | 1988-04-26 |