Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4887516 | Clamping arrangement for diaphragm piston assembly | Daniel G. Scott | 1989-12-19 |
| 4850654 | Freight brake emergency valve | James E. Hart, Edward W. Gaughan | 1989-07-25 |
| 4819993 | Freight brake control valve device having improved quick service function | Edward W. Gaughan | 1989-04-11 |