Issued Patents All Time
Showing 76–96 of 96 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5288987 | Autofocusing arrangement for a stereomicroscope which permits automatic focusing on objects on which reflections occur | Uwe Vry, Christian Lucke, Werner Muller, Joachim Luber, Klaus Knupfer +3 more | 1994-02-22 |
| 5249735 | Channel plate assembly with parallel plates, process and fixture for manufacturing the same, and plate apparatus provided with the same | Helmut Zeh, Rudolf Wilhelm | 1993-10-05 |
| 5183571 | Multilayer membrane and process of manufacturing the same | Peter Hanel, Harald Helmrich | 1993-02-02 |
| 5161611 | Channel plate assembly with parallel plates, process and fixture for manufacturing the same, and plate apparatus provided with the same | Helmut Zeh, Rudolf Wilhelm | 1992-11-10 |
| 5096683 | Process of combusting an H.sub.2 S-containing gas | Manfred Kriebel, Herbert Fischer | 1992-03-17 |
| 5030415 | Structural part made of ferritic chromium-molybdenum steel which is resistant to concentrated sulfuric acid | Karl-Heinz Dorr, Hermann Muller, Wolfram Schalk, Ernst Wallis | 1991-07-09 |
| 4998810 | Illuminating device for an operation microscope | Klaus Biber | 1991-03-12 |
| 4991947 | Two optomechanically coupled surgical microscopes with coaxial illumination | Ulrich Lemke, Albrecht Vogel | 1991-02-12 |
| 4974951 | Surgical microscope with rapid focal-length changer | Kurt S. Schulz | 1990-12-04 |
| 4946784 | Spherical biocatalyst containing titanium dioxide particles | — | 1990-08-07 |
| 4936954 | Apparatus for separating liquid mixtures by pervaporation | — | 1990-06-26 |
| 4895989 | Process for producing alkali metal alcoholates | Pavel Soukup, Harald Helmrich, Wilfried Weiss | 1990-01-23 |
| 4779968 | Coaxial illuminating system for operation microscopes | — | 1988-10-25 |
| 4605287 | Surgical microscope for two surgeons | Walter Lang, Klaus Biber, Ulrich Lemcke | 1986-08-12 |
| 4582481 | Process of drying sulfide ores in direct contact with hot drying gases | Karl-Heinz Dorr, Alfons Schulte, Heinrich Traulsen | 1986-04-15 |
| 4533537 | Process of producing sulfuric acid | Heinz Dittmar, Manfred Beckmann, Karl-Heinz Dorr, Ulrich Rothe | 1985-08-06 |
| 4431573 | Method of producing an alkali sulfate catalyst V.sub.2 O.sub.5 | Wolfgang Fennemann, Manfred Bick | 1984-02-14 |
| 4368183 | Process of producing concentrated sulfuric acid | Karl-Heinz Dorr, Hugo Grimm, Robert Peichl, Franz Maier | 1983-01-11 |
| 4333917 | Process of producing sulfuric acid | Karl-Heinz Dorr, Helmut Diekmann, Hugo Grimm, Michael Tacke, Waldemar Weber | 1982-06-08 |
| 4330364 | Process of strengthening dilute phosphoric acid | Walter Blumrich, Karl-Heinz Dorr, Hans-Joachim Konig | 1982-05-18 |
| 4276116 | Process of strengthening dilute phosphoric acid | Walter Blumrich, Karl-Heinz Dorr, Hans-Joachim Konig | 1981-06-30 |