Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5684457 | Tamper indication system for combination locks | Michael P. Harvey | 1997-11-04 |
| 5653135 | High security lock mechanism | Michael P. Harvey, James L. Taylor, Thomas R. Clark, Gerry Dawson | 1997-08-05 |