Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4461053 | Multiple part toothbrush having an exchangeable brush head | Klaus Nitzsche, Ludwig Lang | 1984-07-24 |
| 4239123 | Releasably fixed mouthpiece as device for drinking from a container | Ludwig Lang | 1980-12-16 |