Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7737998 | System and method for contiguous images from polygons | Daniel Keim, Stephen C. North | 2010-06-15 |
| 7286144 | System and method for contiguous images from polygons | Daniel Keim, Stephen C. North | 2007-10-23 |
| 6853386 | Method for generating contiguous cartograms | Daniel Keim, Stephen C. North | 2005-02-08 |