Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5032215 | Method of etching ceramic frictional or sealing elements | Ulf Dworak, Kilian Friederich, Hans Olapinski | 1991-07-16 |
| 4840154 | Tubular ceramic body for gas passages in cylinder head of internal combustion engine | Wolf-Dieter Gundel | 1989-06-20 |
| 4716869 | Valve guide for an internal combustion engine | Ulf Dworak, Hans Olapinski, Ulrich Krohn | 1988-01-05 |
| 4643144 | Operating element for operating the valves of an internal combustion engine | Gernot Habel | 1987-02-17 |
| 4535683 | Piston with a member made of partially stabilized zirconium oxide | Ulf Dworak, Hans Olapinski, Ulrich Krohn | 1985-08-20 |
| 4526824 | Thermal insulation lining of ceramic material for a hot gas duct enveloped in metal | Ulf Dworak, Hans Olapinski, Ulrich Krohn | 1985-07-02 |
| 4524732 | Cylinder head of a piston engine | Ulf Dworak, Hans Olapinski, Ulrich Krohn, Martti J. A. Hakulinen, Bengt Palm | 1985-06-25 |
| 4522171 | Pre-combustion or turbulence chamber for internal combustion engines | Ulf Dworak, Hans Olapinski, Ulrich Krohn | 1985-06-11 |
| 4522415 | Piston ring for an internal combustion engine | Ulf Dworak, Hans Olapinski, Ulrich Krohn | 1985-06-11 |
| 4519359 | Mullite plate | Ulf Dworak, Hans Olapinski, Ulrich Krohn, Martti J. A. Hakulinen, Bengt Palm | 1985-05-28 |
| 4420142 | Machine component of oxide ceramic material | Ulf Dworak, Hans Jud, Hans Olapinski, Ulrich Krohn | 1983-12-13 |