Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4789934 | Signature verification algorithm | Thomas K. Worthington | 1988-12-06 |
| 4736445 | Measure of distinguishability for signature verification | — | 1988-04-05 |
| 4553259 | Semi-independent shifting technique for signature verification | Timothy J. Chainer, Thomas K. Worthington | 1985-11-12 |