Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D276733 | Teaching machine | Dietmar Nagel, Andrew Lowinger | 1984-12-11 |
| D271029 | Quizzer toy | Dietmar Nagel, Andrew Lowinger | 1983-10-18 |
| D271030 | Preprogrammed toy sound generator | Dietmar Nagel, Andrew Lowinger | 1983-10-18 |