Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6995383 | Method of verifying the authenticity of a security document and document for use in such a method | Paul Zientek | 2006-02-07 |
| 6770898 | Method of verifying the authenticity of a security document and document for use in such a method | Paul Zientek | 2004-08-03 |