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