Issued Patents 1989
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879065 | Processes of making plastics mixtures which absorb electromagnetic radiation and contain ferroelectric and/or piezoelectric substances | — | 1989-11-07 |
| 4865762 | Polymers which form liquid-crystalline phases | Willi Kreuder, Peter Neumann, Karl-Heinz Etzbach, Helmut Ringsdorf | 1989-09-12 |
| 4859639 | Process of making amorphous silicon nitride powder | — | 1989-08-22 |
| 4839119 | Preparation of very strong pore-free ceramic silicon carbide moldings stable at high temperature | — | 1989-06-13 |
| 4828941 | Methanol/air fuel cells | — | 1989-05-09 |
| 4824878 | Composites of thermoplastic polymers and silica reinforcing fibers | — | 1989-04-25 |
| 4802061 | Microelectronic components and thick-film hybrid circuits | Michael Portugall, Gerd Blinne, Heinz-Dieter Vondenhagen, Erhard Seiler, Hans-Friedrich Schmidt +1 more | 1989-01-31 |
| 4797465 | Wholly aromatic mesomorphic polyether esters and the preparation thereof | Michael Portugall, Gerd Blinne | 1989-01-10 |