Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5379269 | Position determining apparatus | Thomas L. Stone | 1995-01-03 |
| 5009277 | Method and apparatus for position determination | Robert D. Butler | 1991-04-23 |
| 4973800 | Apparatus for digitizing positions on a transparency | Harold S. Terk | 1990-11-27 |
| 4956824 | Position determination apparatus | Robert D. Butler | 1990-09-11 |
| 4357672 | Distance ranging apparatus and method | Joseph A. Howells | 1982-11-02 |