Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7128630 | Method for manufacturing a spark plug with glaze coating | Heinz Geier | 2006-10-31 |
| 6922007 | Spark plug with glaze coating | Heinz Geier | 2005-07-26 |
| 6794802 | Spark plug for an internal combustion engine and method for producing a spark plug | — | 2004-09-21 |
| 6699807 | Glass ceramic material, method for producing the same and spark plug containing such a glass ceramic material | Heinz Geier, Imke Koengeter, Ulrich Eisele | 2004-03-02 |
| 6693053 | Glass and glass powder mixture and use thereof for the production of a glass ceramic | Heinz Geier, Ulrich Eisele, Peter Wange | 2004-02-17 |
| 6580202 | Electrically conductive sealing mass for spark plugs | — | 2003-06-17 |
| 6559578 | Spark plug for an internal combustion engine | Werner Herden, Thomas Brinz, Ulrich Eisele, Andreas Niegel | 2003-05-06 |
| 6455988 | Spark plug having a particular resistor | Lothar Weber, Thomas Brinz, Ulrich Eisele | 2002-09-24 |
| 6380664 | Spark plug having an internal conductor configuration | — | 2002-04-30 |
| 5952770 | Spark plug for internal combustion engine | Roland Mueller, Richard Adamczuk, Werner Herden, Manfred Vogel, Walter Benedikt +5 more | 1999-09-14 |
| 5565730 | Electrically conducting sealing compound for spark plugs | Alfons Scheuring | 1996-10-15 |
| 4519784 | Method of inserting a center electrode in a spark plug insulator | — | 1985-05-28 |
| 4406968 | Sparkplug for internal combustion engine | Karl-Hermann Friese | 1983-09-27 |