Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6178641 | Electrical hair-cutting apparatus | — | 2001-01-30 |
| 6076227 | Electrical surface treatment device with an acoustic surface type detector | Michiel A. A. Schallig, Peter Sofrides Viet, Jan Tiesinga | 2000-06-20 |
| 5231760 | Shaving apparatus | Marinus P. Koster, Ferdinand Sereinig, Albert Visscher | 1993-08-03 |
| 4951394 | Hair cutting unit | — | 1990-08-28 |
| 4184250 | Cutter foil for dry shaving apparatus | — | 1980-01-22 |