Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11338786 | Spring brake actuator with diaphragm retainer | Robert L. Koelzer, Albert D. Fisher, Aaron C. Bradford, Michael R. Jenkins | 2022-05-24 |
| 10889280 | Spring brake actuator with diaphragm retainer | Robert L. Koelzer, Albert D. Fisher, Aaron C. Bradford, Michael R. Jenkins | 2021-01-12 |
| 10626939 | Adhesive attachment of the disc brake pushrod plate to the diaphragm | — | 2020-04-21 |
| 8256341 | Air brake diaphragms | — | 2012-09-04 |
| 7150344 | Actuator and slack adjuster | — | 2006-12-19 |
| 6536329 | Brake actuator having tamper resistant riveted spring chamber | Maurice Anderson | 2003-03-25 |