Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5987681 | Electric toothbrush | Klaus Hofer, Andreas Ruhmkorff | 1999-11-23 |
| 5651157 | Electric toothbrush with vibration | — | 1997-07-29 |
| 5213434 | Work device shaft for the electric drive mechanism of a toothbrush | — | 1993-05-25 |