Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6798169 | Rechargeable toothbrushes with charging stations | Martin Stratmann | 2004-09-28 |
| 6753663 | Electric motor controlled as an electroacoustic transducer | Philipp Jung | 2004-06-22 |