Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5060981 | Transparent overlay for protecting a document from tampering | Douglas K. Fossum, Susan K. Jongewaard | 1991-10-29 |
| 4968063 | Transparent tamper-indicating document overlay | Susan K. Jongewaard, Douglas K. Fossum | 1990-11-06 |