Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5710579 | Sensor system for printers | Richard A. Hahs | 1998-01-20 |
| 5408591 | Automatic calibration and servo control scheme for offsetting mechanical and electronic component variances | Liang Shih | 1995-04-18 |
| 5157317 | Method and apparatus for employing an unregulated power supply to power precision motors in a pen plotter | — | 1992-10-20 |
| 4935878 | System friction compensation in vector plotters | Sandor L. Lengyel | 1990-06-19 |
| 4209741 | Apparatus for the continuous monitoring of ground bed resistance | Wils L. Cooley | 1980-06-24 |