Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5346291 | Fluid pressure control valve with valve member mounted on guide pin slidably carried by piston | Andrew Marsh | 1994-09-13 |
| 5340212 | Proportioning relay valve disabled by failed front braking circuit | — | 1994-08-23 |
| 5118165 | Electro-pneumatic spring and service brake actuator | — | 1992-06-02 |
| 4850651 | Proportioning brake control valve with caged tare pressure spring | — | 1989-07-25 |
| 4651851 | Rotor for a disc brake assembly | Kurt R. Heidmann | 1987-03-24 |