Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4728582 | Ceramic sliding element with aluminum oxide and silicon nitride members | Hans-Jurgen Comans, Ulrich Krohn, Hans-Gerd Rittel | 1988-03-01 |
| 4420142 | Machine component of oxide ceramic material | Ulf Dworak, Hans Olapinski, Dieter Fingerle, Ulrich Krohn | 1983-12-13 |