Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5689287 | Context-preserving display system using a perspective sheet | George G. Robertson | 1997-11-18 |
| 5670984 | Image lens | George G. Robertson | 1997-09-23 |
| 5666214 | Paper user interface for image manipulations such as cut and paste | Walter A. Johnson | 1997-09-09 |