Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6762539 | Spark plug for an internal combustion engine and method for production of a middle electrode for an internal combustion engine spark plug | Dittmar Klett, Heinz Ulm, Simon Schmittinger, Jochen Fischer | 2004-07-13 |
| 6759796 | Compact spark plug and method for its production | Dittmar Klett, Simon Schmittinger, Walter Benedikt | 2004-07-06 |