Issued Patents 2004
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6802573 | Parking control circuit | David John Knight | 2004-10-12 |
| 6769744 | Spring brake modulating relay valve | Andrew Marsh, John Kemer, Dave Knight, Richard T. Ross | 2004-08-03 |
| 6758298 | School bus door/service brake interlock system | Michael D. Grandstaff | 2004-07-06 |
| 6743277 | Service reservoir purge of air dryers in pump-off mode | David J. Goodell | 2004-06-01 |
| 6702400 | School bus door/service brake interlock retrofit system | — | 2004-03-09 |
| 6695893 | Continuous flow dryer reservoir module dryer system | Fred W. Hoffman, Leonard A. Quinn | 2004-02-24 |