Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5689253 | Ergonomic keyboard apparatus | William R. Hargreaves | 1997-11-18 |
| 5673040 | Ergonomic keyboard apparatus | William R. Hargreaves, William P. Farrand | 1997-09-30 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5689253 | Ergonomic keyboard apparatus | William R. Hargreaves | 1997-11-18 |
| 5673040 | Ergonomic keyboard apparatus | William R. Hargreaves, William P. Farrand | 1997-09-30 |