Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5612524 | Identification symbol system and method with orientation mechanism | Robert Sant'Anselmo, David C. Hooper | 1997-03-18 |
| 4972475 | Authenticating pseudo-random code and apparatus | — | 1990-11-20 |
| 4924078 | Identification symbol, system and method | Robert Sant'Anselmo, David C. Hooper | 1990-05-08 |