Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6742712 | Information card and information card system | Richard Eason, Kunihiro Tsuda | 2004-06-01 |
| 6697498 | Method and computer program product for hiding information in an indexed color image | Richard Eason, Michiharu Niimi | 2004-02-24 |