Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5594468 | Optical system auxiliary input calibration arrangement and method of using same | Roger N. Marshall, Richard M. Lizon, Lane T. Hauck | 1997-01-14 |
| 5489923 | Method and apparatus for calibrating an optical computer input system | Roger N. Marshall, Lane T. Hauck, Leonid Shapiro, Eric S. Stevens | 1996-02-06 |
| 5181015 | Method and apparatus for calibrating an optical computer input system | Roger N. Marshall, Lane T. Hauck, Leonid Shapiro, Eric S. Stevens | 1993-01-19 |