Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6392199 | Glow plug and process for its manufacture | Martin Allgaier, Michael Haussner, Heinz-Georg Schmitz, Ulf Wyrwich, Reinhold Grebe +2 more | 2002-05-21 |
| 6255626 | Glow plug and process for its manufacture | Martin Allgaier, Michael Haussner, Heinz-Georg Schmitz, Ulf Wyrwich, Reinhold Grebe +2 more | 2001-07-03 |
| 5093555 | Glow plug having cobalt/iron alloy regulating filament | Bertram Dupuis, Paul Bauer | 1992-03-03 |
| 5091631 | Glow plug having a series connection of resistant filaments | Bertram Dupuis, Paul Bauer | 1992-02-25 |