Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8493326 | Controller with removably attachable text input device | James R. Stewart, William P. Stiles, Richard S. Lum, Robert Walker | 2013-07-23 |
| 7762892 | Mode-altering key for a character input device | Richard S. Lum, William Guo | 2010-07-27 |
| 7283125 | Text input device and adapter mechanism | William P. Stiles, Richard S. Lum, Robert Walker | 2007-10-16 |
| 7116311 | Embedded text input | Richard S. Lum, William Guo | 2006-10-03 |
| D483770 | Keyboard key configuration | Richard S. Lum | 2003-12-16 |