Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE31791 | Pick-proof lock | — | 1985-01-08 |
| 4328692 | Booby-trapped lock cylinder with integral intrusion detector | George K. C. Hardesty | 1982-05-11 |
| 4194379 | Pick-proof lock | — | 1980-03-25 |