Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7913425 | Convertible traction shoes | Patrick Michael O'Brien, John M. O'Brien | 2011-03-29 |
| 7584554 | Convertible traction shoes | Patrick Michael O'Brien, John M. O'Brien | 2009-09-08 |
| 7234250 | Convertible traction shoes | Patrick Michael O'Brien, John M. O'Brien | 2007-06-26 |
| 6634222 | System for removing vehicles having unsafe tires from public roadways | Patrick Michael O'Brien, John M. O'Brien | 2003-10-21 |