Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6222988 | Electrically driven hair care appliance | Wilfried Rolf | 2001-04-24 |
| 6035097 | Electrical heating unit with two concentrically disposed heating elements | Boris Wonka, Wilfried Rolf, Robert Jung | 2000-03-07 |
| 6003239 | Electrically powered device for treatment of hair | Dieter Liebenthal, Ralf Dorber, Peter Janouch | 1999-12-21 |
| 5810911 | Filter device for an air-moving hair care appliance | Hans-Jurgen Golob, Robert Jung, Wilfried Rolf, Boris Wonka, Björn Kling | 1998-09-22 |
| 5701681 | Hand-held hair dryer | Boris Wonka, Gerald Imhof | 1997-12-30 |