Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7913488 | Internal combustion engine with secondary air injection system | Hedwig Schick, John Baumann | 2011-03-29 |
| 6620090 | Free-jet centrifuge for cleaning lubricant oil with reduced run-on times | Peter Frehland | 2003-09-16 |
| 4948549 | Process for producing soot filter elements | Hans Erdmannsdorfer, Helmut Rocker, Hartmut Wolff, Fritz Zundel | 1990-08-14 |
| 4809492 | Torsionally balanced wire rope or cable | — | 1989-03-07 |