Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5878158 | Ridge-valley minutia associator for fingerprints | Stephen Ferris, Terry K. Lindh | 1999-03-02 |
| 5631972 | Hyperladder fingerprint matcher | Stephen Ferris, Terry K. Lindh | 1997-05-20 |
| 4386234 | Cryptographic communication and file security using terminals | William F. Ehrsam, Robert C. Elander, Stephen M. Matyas, Carl H. W. Meyer, Paul N. Prentice +2 more | 1983-05-31 |
| 4238853 | Cryptographic communication security for single domain networks | William F. Ehrsam, Robert C. Elander, Stephen M. Matyas, Carl H. W. Meyer, Paul N. Prentice +2 more | 1980-12-09 |