Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9725364 | Method for reducing hexavalent chromium in oxidic solids | Holger Friedrich, Chris Labuschagne, Dawie Van Der Merwe, Barry Visagie | 2017-08-08 |
| 9663383 | Process for preparing chromium(III) oxide | Matthias Stenger, Matthias Boll, Holger Friedrich | 2017-05-30 |
| 9580333 | Process for preparing chromium(III) oxide | Holger Friedrich, Matthias Boll | 2017-02-28 |
| 6873900 | Method for operating an internal combustion engine and arrangement therefor | Gernot Wuerfel | 2005-03-29 |
| 6513486 | Method for impact-reinforced mixture formation in internal combustion engines with direct gasoline injection | Wolfgang Samenfink | 2003-02-04 |