Issued Patents 2011
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7980908 | Spark plug and method for production of a spark plug | Lutz Frassek, Hans Houben | 2011-07-19 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7980908 | Spark plug and method for production of a spark plug | Lutz Frassek, Hans Houben | 2011-07-19 |