Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4644840 | Electronic keyboard musical instrument and a method of operating the same | Reinhard Franz, Wilfried Dittmar, Christian Scheidegger | 1987-02-24 |
| 4572048 | Electronic musical instrument | Reinhard Franz, Wilfried Dittmar, Christian Scheidegger | 1986-02-25 |