Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5668603 | Video finger print method and apparatus | — | 1997-09-16 |
| 5659613 | Method and apparatus for copy protection for various recording media using a video finger print | John O. Ryan | 1997-08-19 |