Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4885264 | Pressure-sintered polycpystalline mixed materials with a base of hexagonal boron nitride, oxides and carbides | Peter Sindlhauser, Klaus Hunold | 1989-12-05 |
| 4814301 | Polycrystalline sintered articles based on silicon nitride and sintering additives | Detlef Steinmann | 1989-03-21 |
| 4803183 | Dense molded bodies of polycrystalline aluminum nitride and process for preparation without use of sintering aids | Karl-Alexander Schwetz, Wolfgang Grellner, Klaus Hunold, Max Mohr | 1989-02-07 |