Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5668874 | Identification card verification system and method | David M. Kristol | 1997-09-16 |
| 5629770 | Document copying deterrent method using line and word shift techniques | John T. Brassil, Steven H. Low, Nicholas F. Maxemchuk | 1997-05-13 |