| Number | Date | Country | Kind |
|---|---|---|---|
| 4100956 | Jan 1991 | DEX | |
| 9112534[U] | Oct 1991 | DEX |
| Number | Name | Date | Kind |
|---|---|---|---|
| 4422365 | Iwaki | Dec 1983 | |
| 4651612 | Matsumoto | Mar 1987 | |
| 4694723 | Shinohara et al. | Sep 1987 |
| Entry |
|---|
| "Musiprof-Bedienflache" Design by G. Knoppek, Version 2.2, Mar. 25, 1992. |