Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6968681 | Method and device for aftertreatment of exhaust gases from combustion engines | Olaf Andersen, Gennadi Zikoridse, Ernstwendelin Bach, Frank Bretschneider | 2005-11-29 |
| 6828026 | Hollow balls and a method for producing hollow balls and for producing light-weight structural components by means of hollow balls | Frank Bretschneider, Herbert Stephan, Juergen Brueckner, Lothar Schneider, Ulf Waag +2 more | 2004-12-07 |