Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5194703 | Push-button arrangement | — | 1993-03-16 |
| 4918271 | Pushbutton type keyboard switch | — | 1990-04-17 |
| 4445647 | Supply roll holding arrangement | Folker Galaske, Helmuth Kettenbach | 1984-05-01 |
| 4378478 | Double-domed elastomeric keyboard element | — | 1983-03-29 |
| 4363942 | Assembly for the keyboards of electric typewriters or similar machines | Oswald Hack | 1982-12-14 |