Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7021610 | Ring shaped spring device | Philip G. Costello | 2006-04-04 |
| 6966549 | Ring shaped spring device | Philip G. Costello | 2005-11-22 |
| 6964412 | Ring shaped spring device | Philip G. Costello | 2005-11-15 |
| 6575439 | Ring shaped spring device | Philip G. Costello | 2003-06-10 |