Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5220409 | Light beam detection utilizing hologram | — | 1993-06-15 |
| 4986662 | Touch entry using discrete reflectors | — | 1991-01-22 |
| 4855590 | Infrared touch input device having ambient compensation | Paul P. Kratochvil, John R. Rowlette, Sr. | 1989-08-08 |