Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12077983 | Key and key blanks operable in vertically and horizontally oriented keyways | Thomas Duckwall, Peter H. Field, Douglas E. Trent | 2024-09-03 |
| 9045915 | Key with movable element disposed within key blade | Peter H. Field, Dan Boadwine | 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, Dan Boadwine, Doug Trent, Peter H. Field | 2011-03-01 |
| 7797973 | Hierarchical cylinder lock systems | Peter H. Field, David P. Sutherland | 2010-09-21 |
| 6945082 | Key blank, key and master keying system | Peter H. Field, Andy Perkins, Anthony Hicks, Mark Benzie, Glenn Hartman +3 more | 2005-09-20 |