Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5308992 | Currency paper and banknote verification device | Robert J. Danek, Steven K. Harbaugh, Richard A. Menelly | 1994-05-03 |
| 5279403 | Microwave security thread detector | Steven K. Harbaugh | 1994-01-18 |