Issued Patents All Time
Showing 26–33 of 33 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4894094 | Disazo compounds and formulations containing same | Wolfgang Ruff, Egon Liedek, Hans W. Sonneborn | 1990-01-16 |
| 4892793 | Nickel-cadmium cell apparatus | Klaus von Benda, Gabor Benczur-Urmossy, Rainer Klink, Uwe Gierz | 1990-01-09 |
| 4720304 | Pigment formulations | Wolfgang Ruff, Egon Liedek, Hans W. Sonneborn | 1988-01-19 |
| 4602960 | Modified diarylide pigments and their preparation | Egon Liedek, Wolfgang Ruff, Hans W. Sonneborn, Reinhard Kemper | 1986-07-29 |
| 4397952 | Process for obtaining glucose dehydrogenase and micro-organism therefor | Detlef von Hoerschelmann, Hans Seidel, Armin Masuth, Klaus Beaucamp, Wolfgang Gruber | 1983-08-09 |
| 4250236 | Additive for activating iron electrodes in alkaline batteries | Friedrich Haschka | 1981-02-10 |
| 4247296 | Diazo pigments | Egon Liedeck, Wolfgang Ruff, Peter REITER | 1981-01-27 |
| 4222788 | Mixed pigment and process of preparing the same | Egon Liedek, Peter Dimroth, Wolfgang Ruff, Peter REITER | 1980-09-16 |