Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5718136 | Lost key lock-out cylinder | Jerome V. Andrews, John Carl Bergstrom, Thomas J. DiVito | 1998-02-17 |
| 5630332 | Hybrid plug lock | Thomas J. DiVito, Edward F. Humphrey | 1997-05-20 |
| 4687389 | Key duplication machine | Robert J. Santii | 1987-08-18 |