Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6816175 | Orthogonal browsing in object hierarchies | Birgit Hamp, Frank Neumann, Annette Opalka, Roland Seiffert | 2004-11-09 |
| 6446061 | Taxonomy generation for document collections | Jochen Doerre, Peter Gerstl, Sebastian Goeser, Roland Seiffert | 2002-09-03 |