Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4946112 | Winding apparatus | Friedrich-Karl Nelle, Heinz Lehner | 1990-08-07 |
| 4890349 | Tooth care atricle such as a toothbrush with replaceable insert | — | 1990-01-02 |
| 4884759 | Winding apparatus | Friedrich-Karl Nelle, Heinz Lehner | 1989-12-05 |
| 4461053 | Multiple part toothbrush having an exchangeable brush head | Ludwig Lang, Ortulf G. Lang | 1984-07-24 |