Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11702342 | Method of producing purified graphite | — | 2023-07-18 |
| 7202146 | Process for producing doped semiconductor wafers from silicon, and the wafers produced thereby | Rupert Krautbauer, Simon Zitzelsberger, Lothar Lehmann | 2007-04-10 |
| 6946030 | Method for the production of a silica glass crucible with crystalline regions from a porous silica glass green body | Fritz Schwertfeger, Holger Szillat, Ulrich Lambert, Axel Frauenknecht | 2005-09-20 |
| 6843848 | Semiconductor wafer made from silicon and method for producing the semiconductor wafer | Wilfried von Ammon, Rudiger Schmolke, Erich Daub | 2005-01-18 |
| 6350314 | Process for producing nitrogen-doped semiconductor wafers | Wilfried von Ammon, Herbert Weidner, Dirk Zemke | 2002-02-26 |
| 4529804 | Naphthostyril Ni or Cu complexes, a process for their preparation, and high molecular weight organic material pigmented with these metal complexes | Franz Felix | 1985-07-16 |
| 4191566 | Electrophotographic imaging process using anthraquinoid black pigments or metal complexes | Remy Jeanneret, Gunther Zwahlen, Georgios Zographos | 1980-03-04 |