Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7251784 | Supplying supplementary information for printed books | Johanna Bierwirth, Brett Clark, Kathryn T. Hegeman | 2007-07-31 |
| 7155677 | Portal for supplying supplementary information for printed books | Brett Clark | 2006-12-26 |
| 6034680 | Supplying supplementary information for printed books | Johanna Bierwirth, Brett Clark, Kathryn T. Hegeman | 2000-03-07 |