Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857903 | Electro-optical mouse with improved resolution for compensation of optical distortion | — | 1989-08-15 |
| 4831566 | Method and apparatus for calibration of a charge ratio digitizer | Henry G. Matthews, Jamie L. Barbetti, Al Mletzko | 1989-05-16 |
| 4807166 | Method and apparatus for calibrating an electro-optical mouse | — | 1989-02-21 |