Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5196841 | Vault door locking system featuring microprocessor-based locking means with redundancy control override | Peter Kappeler | 1993-03-23 |
| 4662289 | Protective wall for structures | — | 1987-05-05 |