Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10886705 | Spark plug having a center electrode with improved thermal properties | Ugur Yilmaz, Chris Schimmel, Helene Kasjanow | 2021-01-05 |
| 9819155 | Spark plug | Jorge Diaz Alfonso | 2017-11-14 |
| 9166378 | Spark plug, in particular swirl chamber spark plug | Jorge Diaz Alfonso | 2015-10-20 |
| 8373337 | Spark plug having a reduced physical volume | Thomas Kaiser, Dirk Scholz | 2013-02-12 |
| 5818152 | Spark plug for an internal combustion engine | Gunter Bolduan, Dittmar Klett, Jurgen Wurth, Oswald Glaser, Roland Muller | 1998-10-06 |
| 5743795 | Self-propelling harvester thresher with adjustable threshing basket | — | 1998-04-28 |
| 5612586 | Spark plug for internal combustion engines | Walter Benedikt, Dittmar Klett, Dietrich Trachte, Roland Mueller, Jochen Fischer | 1997-03-18 |
| 5024630 | Harvester thresher | Horst Harig | 1991-06-18 |
| 5021028 | Harvester thresher with chopper | Franz Piesch | 1991-06-04 |
| 4998904 | Harvester thresher | — | 1991-03-12 |
| 4425925 | Harvester thresher | Heinrich Roderfeld | 1984-01-17 |