Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4643517 | Method and circuit arrangement for frequency-, distance-, and angle-independent surface measurement | James Ruger, Wolfgang Welz | 1987-02-17 |
| D260275 | Action ball toy | — | 1981-08-18 |
| 4272911 | Spinning toy | — | 1981-06-16 |
| D257780 | Simulative driving toy | — | 1981-01-06 |
| 4223474 | Inflatable nursery toy | — | 1980-09-23 |
| 4208831 | Driving simulator toy | — | 1980-06-24 |