Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7160576 | Method and device for blacking components | Wolfgang Lerche, Winfried Grafen, Walter Ooster | 2007-01-09 |
| 5717186 | Method and device for controlling the electric current density across a workpiece during heat treatment in a plasma | Winfried Grafen, Bernd Edenhofer | 1998-02-10 |