Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7251784 | Supplying supplementary information for printed books | Diane Kessenich, Johanna Bierwirth, Brett Clark | 2007-07-31 |
| 6034680 | Supplying supplementary information for printed books | Diane Kessenich, Johanna Bierwirth, Brett Clark | 2000-03-07 |