Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9045915 | Key with movable element disposed within key blade | Peter H. Field, Clyde T. Roberson | 2015-06-02 |
| 8186194 | Cylinder lock and auxiliary locking mechanism | Peter H. Field, David P. Sutherland, Glenn Hartman, Mark Benzie, Walt Dannhardt +2 more | 2012-05-29 |
| 7895865 | Cylinder lock assembly with a tailpiece rotationally coupled to the cylinder plug | Glenn Hartman, Mark Benzie, Clyde T. Roberson, Doug Trent, Peter H. Field | 2011-03-01 |