Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5836233 | Spring brake with sealable breather holes | — | 1998-11-17 |
| 5560280 | Repairable tamper-proof brake | — | 1996-10-01 |
| 4850263 | Spring brake construction and method of manufacture thereof | John T. McGraw | 1989-07-25 |