Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875739 | Independent continual quick service valve device | Edward W. Gaughan | 1989-10-24 |
| 4850654 | Freight brake emergency valve | Edward W. Gaughan, Theodore B. Hill | 1989-07-25 |
| 4830148 | Truss-type brake beam for railway vehicle truck-mounted brake assembly | Earl E. Allan, Allen W. Kyllonen | 1989-05-16 |
| 4830438 | Freight brake emergency valve | Edward W. Gaughan | 1989-05-16 |