Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5645742 | Glow plug with zirconium dioxide coating and nicraly adhesive layer | Gabriele Schmidt, Karl-Heinz Schmidt | 1997-07-08 |
| 5626781 | Glow plug with protective coating | Gabriele Schmidt, Karl-Heinz Schmidt | 1997-05-06 |