Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8186194 | Cylinder lock and auxiliary locking mechanism | Peter H. Field, Glenn Hartman, Mark Benzie, Walt Dannhardt, Kevin Galliher +2 more | 2012-05-29 |
| 7797973 | Hierarchical cylinder lock systems | Peter H. Field, Clyde T. Roberson | 2010-09-21 |