Issued Patents 2002
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6471574 | Dust protection cover for a rotary grinding tool | Hans Rupprecht, Diep Chau-Ngoc, Rudolf Reitberger, Oliver Ohlendorf | 2002-10-29 |
| 6382202 | Drill bit | Diep Chau-Ngoc | 2002-05-07 |
| 6375557 | Hand-held abrasive cutter with a suction hood | Louis Widmer | 2002-04-23 |