Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4492412 | Braking cylinder inlet valve arrangement in braking systems for railway vehicles | David J. Wickham | 1985-01-08 |
| 4206949 | Continuous quick service valves for braking systems | Jack Washbourn, David J. Wickham | 1980-06-10 |