Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6810739 | Accelerometer augmented leveling device | Ray Campbell, Thomas Günther | 2004-11-02 |
| 6785975 | Accelerometer augmented precision compass | Ray Campbell | 2004-09-07 |
| 6776043 | Variable capacitance bridge accelerometer | Ray Campbell | 2004-08-17 |