Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5001307 | Keyboard | — | 1991-03-19 |
| 4349286 | Keyboard assembled from individual keys | Helmut Schmidt, Walter Strobel | 1982-09-14 |
| 4202640 | Keyboard assembly | Helmut Schmidt, Walter Strobel, Gunter Treude | 1980-05-13 |