Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5845579 | Movable thresholds and railway platform barrier doors | Russell Clinton Harding, Derek Tate, Mark Hemmings | 1998-12-08 |
| 4909360 | Brake equipment | — | 1990-03-20 |
| 4895228 | Slack adjuster | Jack Washbourn | 1990-01-23 |
| 4875559 | Tread brake unit | Jack Washbourn | 1989-10-24 |
| 4498711 | Pneumatic control for braking system providing snow brake operation | Jack Washbourn | 1985-02-12 |