Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6559578 | Spark plug for an internal combustion engine | Werner Herden, Rudolf Pollner, Thomas Brinz, Ulrich Eisele | 2003-05-06 |
| 5952770 | Spark plug for internal combustion engine | Roland Mueller, Richard Adamczuk, Werner Herden, Manfred Vogel, Walter Benedikt +5 more | 1999-09-14 |
| 5550424 | Spark plug for internal combustion engines | Irene Jennrich, Lothar Weber | 1996-08-27 |