| 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 |