Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5489128 | Lockset having adjustable backset | — | 1996-02-06 |
| 5440910 | Key adaptor | — | 1995-08-15 |
| 5233851 | Housing and adaptor for interchangeable core and insert cylinders | — | 1993-08-10 |
| 5087090 | Combination lockout/holdback apparatus | Edward F. Humphrey, Nelson J. De Angelo | 1992-02-11 |
| 4823575 | Cylinder lock and key | Thomas Hennessy | 1989-04-25 |