Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6005496 | Ergonomic keyboard apparatus | William R. Hargreaves | 1999-12-21 |
| 5689253 | Ergonomic keyboard apparatus | William R. Hargreaves | 1997-11-18 |
| 5673040 | Ergonomic keyboard apparatus | William R. Hargreaves, William P. Farrand | 1997-09-30 |