Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8134542 | Untethered stylus employing separate communication and power channels | Kathy L. Hagen | 2012-03-13 |
| 8089474 | Location sensing system and method employing adaptive drive signal adjustment | Bernard O. Geaghan | 2012-01-03 |
| 7916501 | Magnetic shield for use in a location sensing system | M. Benton Free, Bernard O. Geaghan, Karl P. Hauck, Billy L. Weaver | 2011-03-29 |
| 7787259 | Magnetic shield for use in a location sensing system | M. Benton Free, Bernard O. Geaghan, Karl P. Hauck, Billy L. Weaver | 2010-08-31 |