Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4982612 | Torque wrench with measurements independent of hand-hold position | — | 1991-01-08 |
| 4934222 | Ergonomic tool | Donald D. Grover | 1990-06-19 |
| 4718127 | Helmet visor with locking hinge assemble | Richard S. Stever, Steven R. Wente | 1988-01-12 |