Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5250880 | Linear motor control system and method | David J. Chesney, Nathaniel L. Field, Bernard K. Huang, John Grant | 1993-10-05 |
| 4802274 | Method of determining worn rotary tool | Charles O. McHugh | 1989-02-07 |